Which cross section best represents the valley shape where a rapidly flowing stream is cutting into the bedrock in a mountainous area
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Answer:
D. The inverted triangle like
Related Questions
mining leads to a reduction in __ because it destroys __ by uprooting forests and demolishing mountainsides
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Mining leads to a reduction in biodiversity because it destroys ecosystems by uprooting forests and demolishing mountainsides.
The process of mining involves extracting valuable minerals or ores from the earth's crust. To access these resources, mining operations often involve clear-cutting forests and removing topsoil, leading to the destruction of habitats for many plant and animal species. Additionally, mining activities can lead to soil erosion, pollution of water bodies, and the release of harmful chemicals into the environment. These impacts on biodiversity can have long-term consequences, including the loss of species, disruption of ecosystems, and imbalance in natural food chains. In summary, mining activities contribute to the reduction in biodiversity through the destruction of habitats and ecosystems.For more questions on biodiversity
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The weathered mountain would appear more jagged than a unweathered
mountain.
True or false ?
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which type of cell receives information from the external world and conveys this information to the brain?
Answers
Sensory neurons are the type of cell that receives information from the external world and conveys this information to the brain.
Sensory neurons, also called afferent neurons, are specialized cells that transmit sensory information from sensory receptors in the body to the central nervous system, which includes the brain and spinal cord. They are responsible for detecting different types of stimuli, such as light, sound, touch, temperature, and chemicals, and converting them into electrical signals that can be processed by the nervous system. Sensory neurons are found in various parts of the body, including the skin, eyes, ears, nose, and tongue, and brain they play a critical role in our ability to perceive and interact with the environment.
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I NEED HELP!! Which cell is bigger A cheek cell or an Onion cell? Explain!
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Answer:
Onion cell
Explanation:
Plant cells tend to be larger in size
Why are active transport proteins called pumps?
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Explanation:
ATP is the most common source of energy for active transport. As molecules are moving against their concentration gradients, active transport cannot occur without assistance. ... These proteins are often called “pumps” because they use energy to pump the molecules across the membrane.
ATP is the most common source of energy for active transport. As molecules are moving against their concentration gradients, active transport cannot occur without assistance. These proteins are often called “pumps” because they use energy to pump the molecules across the membrane.
What is skeletal system?
The skeletal system in the body is composed of muscle tissue, ligaments, and bone. It is in the bone marrow that hematopoiesis (development of blood cells) occurs. These hematopoietic stem cells (HSCs) from red bone marrow differentiate into erythrocytes, platelets, and lymphocytes. Bone marrow is found in the connective tissue interior of bones.
In a healthy person, the concentration of oxygen also called O₂ saturation in arterial blood is in the order of 97 and 100%, both at rest and during exercise.The concentration of oxygen in blood is a parameter that depends on proper respiratory function, and varies according to whether the blood is arterial or venous, where this percentage is lower.
Therefore, ATP is the most common source of energy for active transport. As molecules are moving against their concentration gradients, active transport cannot occur without assistance.
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RBCs usually leave the systemic capillaries at about 75% oxygen saturation. Which term refers specifically to the oxygen remaining in the blood after it passes through a capillary bed
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The term that specifically refers to the oxygen remaining in the blood after it passes through a capillary bed is "saturation". Saturation refers to the amount of oxygen that is bound to hemoglobin in red blood cells.
When RBCs pass through the systemic capillaries, they release approximately 25% of the oxygen they are carrying, resulting in a saturation level of around 75%. This remaining oxygen is crucial for providing tissues and organs with the necessary oxygen for cellular respiration and energy production. If the saturation level drops too low, it can lead to hypoxia, a condition where tissues and organs are not receiving enough oxygen. The body has mechanisms in place to regulate oxygen levels and ensure adequate delivery to tissues. For example, when oxygen levels are low, the kidneys release erythropoietin, which stimulates the bone marrow to produce more red blood cells to carry more oxygen.
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GIVING BRAINLIEST!!!!
Which statement about the relationship between different types of triangles is true?
A) An equilateral triangle is never an obtuse triangle.
B) An equilateral triangle is never an isosceles triangle.
C) A right triangle is always an isosceles triangle.
D) An obtuse triangle is always an acute triangle.
Answers
Answer:
A: An equilateral triangle is never an obtuse triangle
Explanation: :)
The statement that is true about the relationship between different types of triangles is A) An equilateral triangle is never an obtuse triangle.
What is equilateral triangle?An equilateral triangle is a type of triangle in which all three sides are equal in length. An obtuse triangle is a type of triangle in which one angle is greater than 90 degrees.
Since an equilateral triangle has all angles equal, and each angle measures 60 degrees (since the sum of angles in a triangle is 180 degrees), it cannot have an angle greater than 90 degrees.
Therefore, an equilateral triangle is never an obtuse triangle.
The other statements are false:
An equilateral triangle is also an isosceles triangle since it has two sides of equal length.
A right triangle can be isosceles if its two legs are of equal length, but not all right triangles are isosceles.
An obtuse triangle cannot be an acute triangle since an acute triangle has all angles less than 90 degrees.
Triangles are used in various applications, such as in geometry, trigonometry, and engineering. The Pythagorean theorem is a fundamental principle in trigonometry that applies to right triangles and is used to calculate the length of one side of a right triangle if the other two sides are known.
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What evidence from Irina's experiment can be used to show the relationship among light,oxygen, and sugar in photosynthesis
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The evidence from Irina's experiment can be used to show the relationship among light, oxygen, and sugar in photosynthesis is that green plants prepare their own food in the presence of sunlight.
What is photosynthesis?Photosynthesis is defined as the the process by which green plants prepare their own food in the presence of sunlight and the heat energy converted into light energy and due to this reason green plants are known as the autotrophs.
Leaf has been known as the basic site of the photosynthesis it means that process of the photosynthesis occurs in the leaf. The main function of the leaf has to produce food material for plants which will help plants to get nourished.
There has been mainly two types of leaves and these are the simple and compound leaves. The simple leaf has been one in which single lamina has been attached to the stem by the help of petiole and compound leaf is the one in which lamina is divided into leaflets.
Therefore, The evidence from Irina's experiment can be used to show the relationship among light, oxygen, and sugar in photosynthesis is that green plants prepare their own food in the presence of sunlight.
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If a disease were to selectively target spongy bone rather than compact bone, would you expect the individual to have an increased risk of fractures, an increased risk of anemia, neither, or both?
i. neither increased risk of fracture nor anemia
ii. increased risk of both fractures and anemia
iii. increased risk of anemia; spongy bone contributes to bone strength, but its primary function is hematopoiesis.
iv. increased risk of fracture; spongy bone is critical for bone density and strength.
Answers
The correct answer is iv. increased risk of fracture; spongy bone is critical for bone density and strength.
If a disease selectively targets spongy bone rather than compact bone, the individual would have an increased risk of fracture. Spongy bone, also known as trabecular bone, is the internal bone structure of the bone. Hematopoiesis, or blood cell formation, takes place in this area of the bon and the spongy bone is a lightweight yet tough type of bone. The bones are full of open spaces or "pores" that contain bone marrow. Compact bone is a dense type of bone that is responsible for the majority of the bone's strength and structure.
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When people have their gallbladders removed, their bodies no longer have a place to store bile, and the bile flows from the liver continuously. What effect might this have on their ability to digest fats?
A. There will be very little change since bile will still be present to emulsify fats.
B. Fats will be emulsified more efficiently with the constant flow of digestive enzymes.
C. It will be unlikely that they will be able to emulsify and digest fats.
D. Only small amounts of fats will get digested since high concentrations of bile enzymes are needed for efficient digestion.
Answers
Answer:
A. There will be very little change since bile will still be present to emulsify fats.
Explanation:
The gallbladder is a pear-shaped storage sac present in the alimentary canal of humans and functions to store excess bile in between meals. The bile is a greenish-yellow substance composed of different substances like salts, bile pigments, cholesterol etc. The bile is produced in the liver and aids in the digestion of fats.
The gallbladder serves as an intermediary between the organ of bile production (liver) and its destination (intestine). According to the question, once the gallbladder is removed, there is no longer a place to store bile. However, bile will still be produced by the liver and released directly into the intestine instead.
Hence, the bile will still be present to perform its function of emulsifying fats with little changes in the way it is released into the intestine. Note that, the gallbladder only regulates the speed at which the bile is released into the intestine.
At which site do new aminoacyl trnas enter the ribosome during elongation?.
Answers
At which site do new aminoacyl tRNAs enter the ribosome during elongation?
a) B-site
b) A-site
c) P-site
d) E-site
A-Site
Found it on Quizlit hope it helps
Of the following plants, which stem has scattered vascular bundles? A. corn B. magnolia C. chrysanthemum D. hibiscus
Answers
Of the following plants, a. corn stem has scattered vascular bundles.
How do vascular bundles work?The transport system in vascular plants includes vascular bundles. The actual transport takes place in the stem, which comes in the xylem and phloem forms. A vascular bundle, which also contains supporting and protecting tissues, contains both of these tissues. The Cambium, a tissue, is also present between the xylem and the phloem.
Phloem is often found farther from the axis than the xylem, which is typically adaxial (abaxial). This indicates that in a stem or root, the xylem is closer to the interior while the phloem is closer to the exterior. The upper side of a leaf is typically the adaxial surface, and the bottom side is the abaxial surface.
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in the sexual fungal life cycle, which option is correct? group of answer choices once the nuclei fuse (karyogamy) to form a zygote, that zygote then develops into a diploid embryo via mitosis. once the nuclei fuse (karyogamy) to form a zygote, that zygote then develops into an embryo via mitosis. each embryo then produces four spores via meiosis. once the nuclei fuse (karyogamy) to form a zygote, that zygote then produces spores via meiosis once the nuclei fuse (karyogamy) to form a zygote, that zygote then produces spores and an embryo via mitosis. once the nuclei fuse (karyogamy) to form a zygote, that zygote then produces spores and an embryo via either meiosis or mitosis, depending on the environmental conditions.
Answers
Once the nuclei fuse (karyogamy) to form a zygote, that zygote then produces spores and an embryo via either meiosis or mitosis, depending on the environmental conditions.
In the sexual fungal life cycle, the nuclei of two different mating types fuse to form a diploid zygote. This zygote can develop into an embryo via mitosis, which can then produce four spores via meiosis. Alternatively, the zygote can produce spores and an embryo via either meiosis or mitosis, depending on the environmental conditions. This process is known as heterothallism, and it allows for genetic diversity in fungal populations. The resulting spores can then go on to form new fungal colonies and continue the life cycle.
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in the sexual fungal life cycle, which option is correct? group of answer choices once the nuclei fuse (karyogamy) to form a zygote, that zygote then develops into a diploid embryo via mitosis. once the nuclei fuse (karyogamy) to form a zygote, that zygote then develops into an embryo via mitosis. each embryo then produces four spores via meiosis. once the nuclei fuse (karyogamy) to form a zygote, that zygote then produces spores via meiosis once the nuclei fuse (karyogamy) to form a zygote, that zygote then produces spores and an embryo via mitosis. once the nuclei fuse (karyogamy) to form a zygote, that zygote then produces spores and an embryo via either meiosis or mitosis, depending on the environmental conditions.
The group of cells in the hypothalamus that is stimulated by food intake is known as the ________ center.
A) eating
B) satiety
C) basal
D) energy
Answers
The group of cells in the hypothalamus that is stimulated by food intake is known as the eating center. The correct option is A) eating.
The hypothalamus is a part of the brain that links the nervous system to the endocrine system through the pituitary gland. The hypothalamus contains various nuclei that regulate a variety of physiological and behavioral processes, including the regulation of appetite and energy expenditure.
There are two types of nuclei present in the hypothalamus; one is the hunger (feeding) center, and the other is the satiety center. Hunger refers to the desire to consume food, while satiety refers to the sensation of being full or satisfied after eating. The hunger center is responsible for stimulating food intake, while the satiety center is responsible for suppressing food intake.
The hypothalamus, which is the area of the brain that regulates eating and drinking, is stimulated when the body requires food. Hormonal changes signal the hypothalamus to increase or decrease appetite, depending on the body's needs. Eating too much or too little can lead to hormonal imbalances, resulting in obesity or anorexia.
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Imagine that you wish to compare two different diets that will be fed to tadpoles raised in a lab. One diet is a meat-based fish food, and the other is the traditional diet of boiled lettuce. You want to see if the meat-based diet will be associated with an increase in the average weight of the tadpoles. In your experiment you keep all other factors, such as tadpole density per pan, temperature, pH, and the amount of food the same. The only difference between your control and experimental groups is the type of food the tadpoles receive. What is the independent variable for the tadpole diet experiment?
Answers
Answer:
TYPE OF DIET
Explanation:
Independent variable of an experiment is that variable that is subject to manipulation or changing by the experimenter in order to effect a response in the dependent variable.
According to the experiment in this question, the type of diet is changed for different groups of tadpoles in order to see the effect on their average weight. Based on this, the independent/manipulated variable is the TYPE OF DIET administered to each group of tadpole while the growth (average weight) of the tadpoles is the dependent variable.
what is the name of a specific type of model that shows how animals diverge during evolution?(1 point)
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The name of the specific type of model that shows how animals diverge during evolution is known as a phylogenetic tree .
A phylogenetic tree is a visual representation that describes the evolutionary relationships among different species or groups of organisms. It is used to show the patterns of divergence and speciation over time, and can help to reveal the common ancestry and relatedness between different species. The branches of the tree represent the evolutionary lineage of each group, and the nodes or branching points represent common ancestors. The phylogenetic tree is an important tool in the study of evolutionary biology and is used to describe the patterns and processes of evolution.
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Which of the following is a unit of volume?
A gram
A kilometer
A liter
A meter
Answers
Answer:
gram
Explanation:
this question relates to the article titled ""why cancer isn’t going anywhere"". what makes a mutation conferring resistance to a chemotherapy drug highly likely in a population of cancer cells?
Answers
Millions of cells that are quickly reproducing and acquiring new mutations can be seen in even modest tumors.
Coral chemotherapy reefs offer chances for recreation, serve as a barrier against erosion and storm damage, and support local economies. They are also a source of fresh medications and food.
A net imbalance in the fluxes into and out of the atmosphere results from humans releasing carbon from sedimentary reservoirs into the atmosphere at a pace that is an order of magnitude (about 10 times) faster than natural rates owing to volcanoes and natural oxidation of coal. Only the bacterial and eukaryotic domains of life—Bacteria, Archaea, and Eukarya—have been shown to use chlorophyll for photosynthesis.
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Importance of having your child vaccinated
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Hope this helps :)
Red blood cells can be separated from blood plasma using a centrifuge. This device spins the whole blood samples rapidly in a circular path and can generate forces many times that of gravity. The more dense material (red blood cells) accumulates at the outer end of the container while the less dense material (plasma) is closer to the centre of rotation. One " g " is the equivalent of 9.80 ms^−2
. How many "g"s is experienced by the material spinning in the centrifuge at a distance of 19.5 cm from the centre of rotation at 2,360 revolutions per minute? Calculate your answer in mks units correct to three significant figures.
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To calculate the acceleration in "g"s experienced by the material spinning in the centrifuge, we need to convert the distance from the center of rotation from centimeters to meters.
Convert the revolutions per minute to radians per second, and then apply the formula for centripetal acceleration.
1 meter = 100 centimeters1 revolution = 2π radiansFirst, let's convert the distance from centimeters to meters:\(19.5 cm = 19.5/100 m = 0.195 m\)Next, let's convert the revolutions per minute to radians per second:
2,360 revolutions per minute \(= 2,360 * 2\pi /60\) radians per second ≈ 247.38 radians per second
Now, we can calculate the acceleration in "g"s using the formula for centripetal acceleration:acceleration = (angular velocity)^2 * radiusangular velocity = 247.38 radians per secondradius = 0.195 macceleration \(= (247.38)^2 * 0.195 = 119,078.4 m/s^2\)Finally, let's convert the acceleration to "g"s by dividing it by the acceleration due to gravity: acceleration in "g"s \(= 119,078.4 m/s^2 / 9.80 m/s^2 =12,143.76 g\)
Therefore, the material spinning at a distance of 19.5 cm from the center of rotation in the centrifuge experiences approximately 12,143.76 "g"s.
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4. Eat a good breakfast and you will be able to run longer. What characteristic of life is that?
Answers
use of energy, if I'm not mistaken
A good breakfast means food that contains a good amount of nutrition. Therefore, a good breakfast gives a good life.
Balanced diet:A balanced diet contains an equal amount of protein, carbohydrates and nutrients, and vitamins. A good breakfast should contain milk, a good amount of proteins, and juices.
This food gives you the energy to work properly. The person will feel fresh and energetic to work properly. It has many health benefits. A good breakfast provides :
EnergyEssential vitamins, nutrientsBoosts brain power.It reduces the risk of illness.A good breakfast include:
ProteinWhole grainsBlend up a breakfast smoothie.Therefore, A good breakfast means food that contains a good amount of nutrition. Therefore, a good breakfast gives a good life.
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Explain the significance of the nucleus in determining the characteristics of the offspring
Answers
It includes chromosomes or genes or DNA (which) contribute half (the genes) to the fetus.
What is DNA?Deoxyribonucleic acid (abbreviated DNA) exists as the molecule that maintains genetic information for the expansion and functioning of an organism. DNA is made of two connected strands that wind around each other to correspond to a twisted ladder — a condition known as a double helix.
Deoxyribonucleic acid exists as a polymer comprised of two polynucleotide chains that coil around each other to create a double helix carrying genetic instructions for the development, functioning, development, and reproduction of all known organisms and numerous viruses. DNA and ribonucleic acid exist in nucleic acids.
It includes chromosomes or genes or DNA (which) contribute half (the genes) to the fetus.
A chromosome exists as a long DNA molecule with parts or all of the genetic material of an organism. Most eukaryotic chromosomes contain packaging proteins named histones which, aided by chaperone proteins, bind to and condense the DNA molecule to preserve its integrity.
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Identical twins=fraternal twins, Identical twins raised together =/= identical twins raised apart, Adoptive child= adoptive parents
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Identical twins are the result of a single fertilized egg splitting into two identical embryos. They share almost the same genetic makeup and are of the same gender.
On the other hand, fraternal twins are the result of two separate fertilized eggs, sharing about 50% of their genes, like any other siblings.
Identical twins raised together and identical twins raised apart may have different experiences that shape their personality, behavior, and cognitive abilities, leading to variations in their outcomes.
Though their genes are the same, environmental factors play a significant role in determining their development.
Twins raised together share similar environments, experiences, and parenting styles, while twins raised apart have different experiences and may have different life events that affect their development.
An adoptive child is one who is legally taken in and raised by a couple who is not biologically related.
The child's genetic makeup is different from the adoptive parents, and they may have different behavioral tendencies, talents, and abilities. The child's development may be influenced by their genetic makeup, prenatal environment, and early life experiences.
The adoptive parents may have to deal with unique parenting challenges as they may not know the child's complete medical history or family background.
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What would be the result of inhibiting the transpeptidation reaction during peptidoglycan synthesis?
- Peptidoglycan monomers would not translocate across the membrane
- Peptidoglycan structure would weaken
- Autolysin activity would cease
- Additional proteins would be secreted from the cell
Answers
Inhibiting the transpeptidation reaction during peptidoglycan synthesis would result in the following: Peptidoglycan structure would weake
What is peptidoglycan?Peptidoglycan is an important structural component of bacterial cell walls that is responsible for maintaining their shape and resisting external pressures. It is made up of glycan chains that are cross-linked by peptide chains, which provide rigidity and strength to the cell wall.Transpeptidation reactionIn the process of peptidoglycan synthesis, the transpeptidation reaction is responsible for cross-linking the peptide chains between the glycan chains. This reaction is catalyzed by the enzyme transpeptidase and is essential for the formation of a strong and stable peptidoglycan structure.
Inhibiting the transpeptidation reaction would result in the weakening of the peptidoglycan structure, which could make the bacterial cell more susceptible to external pressures and ultimately lead to its destruction. Hence, option B is correct.
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state the relationship between cell function and cell structure?
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Answer: The structure of the cell depends on what type of function it performs. The organisms can only function properly if the structure goes along with the function it is to perform.
Cell function and cell structure are intimately related. The specific structure of a cell determines its function or the tasks it can carry out. For example, a muscle cell has a unique structure with many contractile proteins that allow it to generate force and movement, whereas a nerve cell has a unique structure with long, branching extensions that allow it to transmit signals over long distances.
The cell's structure is designed to support its function. Different types of cells have different structures that are adapted to carry out specific tasks. For example, red blood cells are specialized to carry oxygen and have a unique biconcave shape that allows them to flow easily through narrow blood vessels. Similarly, the shape and structure of a leaf cell are adapted to maximize photosynthesis and energy production, while the structure of a bone cell is adapted to provide strength and support to the body.
Therefore, the structure of a cell is closely related to its function, and changes in cell structure can affect its function. For example, changes in the shape or structure of a muscle cell can affect its ability to generate force and movement. Similarly, changes in the structure of a nerve cell can affect its ability to transmit signals effectively. Understanding the relationship between cell function and structure is critical in understanding how cells work and in developing new therapies for diseases that affect cell structure and function.
which criteria are used to classify epithelia?multiple select question.functionshape of cells at basal surfaceshape of cells at apical surfacenumber of cell layers
Answers
The classification of epithelia is based on the shape of cells at the basal and apical surfaces, as well as the number of cell layers.
The classification of epithelia is based on multiple criteria, including the shape of cells at basal surfaces, shape of cells at apical surfaces, and the number of cell layers.
The shape of cells at the basal surface refers to the overall shape of the cells at the bottom layer, which can be squamous (flattened), cuboidal (cube-shaped), or columnar (elongated).
The shape of cells at the apical surface refers to the shape of cells at the top layer, which can also be squamous, cuboidal, or columnar.
The number of cell layers can vary, ranging from a single layer (simple epithelium) to multiple layers (stratified epithelium). These criteria help classify and differentiate different types of epithelial tissues found throughout the body.
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The criteria used to classify epithelia include the shape of cells at the basal surface, the shape of cells at the apical surface, and the number of cell layers.
Epithelial tissues are classified based on specific characteristics that help distinguish different types of epithelia. The criteria used for classification are as follows:
1. Shape of cells at the basal surface: This criterion considers the shape of cells at the bottom layer of the epithelium, which is in contact with the underlying basement membrane. The basal cells may be squamous, cuboidal, or columnar in shape.
2. Shape of cells at the apical surface: The shape of cells at the top or free surface of the epithelium is also taken into account. Epithelial cells can exhibit squamous, cuboidal, columnar, or specialized shapes based on their functional requirements.
3. Number of cell layers: The number of layers of cells in the epithelium is another crucial criterion for classification. Epithelia can be classified as simple if they consist of a single layer of cells, or stratified if they have multiple layers of cells. Additionally, there are pseudostratified epithelia, which appear stratified but consist of a single layer of cells.
By considering these criteria, epithelial tissues can be classified into various types, such as simple squamous epithelium, stratified cuboidal epithelium, or pseudostratified columnar epithelium. Understanding the classification of epithelia aids in identifying their structural characteristics and inferring their specific functions within different organs and tissues of the body.
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Which earth system component absorbs more carbon than it releases?.
Answers
Forests are often carbon sinks, absorbing more carbon than they emit.
What is a carbon sink?A carbon sink is anything, natural or man-made, that gathers and retains some carbon-containing chemical component indefinitely, removing carbon dioxide from the atmosphere. These carbon sinks play a vital role in the natural carbon cycle.
Through the process of photosynthesis, they continuously remove carbon from the atmosphere. The ocean is another example of a carbon sink, absorbing a significant amount of CO2 from the atmosphere.
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Which of the following is not a sustainable wastewater practice that an individual can do?
Don't flush prescription drugs
Use biodegradable flushables
Use trash bins for tissue
Flushing sanitary napkins
Answers
Individuals would do all the sustainable wastewater that are mentioned, which are using biodegradable flushables, using prescription drugs and using trash bins instead of flushing sanitary napkins. Thus, option B is correct.
What is sustainable wastewater ?Sustainable wastewater management has been the need of the hour, as the using water in the way that would meets the current, ecological, social, and economic needs of an individual.
In order to increase the efficiency of the wastewater reuse by encouraging water reuse, reduction or recovery in our day to day lifestyle.
Therefore, Individuals would do all the sustainable wastewater that are mentioned, which are using biodegradable flushables, using prescription drugs and using trash bins instead of flushing sanitary napkins. Thus, option B is correct.
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Explain why most nerve cells have a myelin sheath (2 marks)
Answers
Answer:
This allows electrical impulses to travel efficiently and quickly along the cells.
the major idea that darwin presented in his book the origin of species was that
Answers
On the Origin of Species, a well-known and contentious book by Charles Darwin, was published in the 1850s. In it, he put forth the idea that species change over time (or, as he described it, go through "descent with modification").
These all living things descended from a single progenitor. Darwin's thesis had two primary tenets: 1) that different animal groupings descended from a single or small number of common ancestors, and 2) that natural selection is the process by which this evolution occurs.
His A convincing case is made in On the Origin of Species by Means of Natural Selection (1859) that the variety of organisms and their traits can be attributed to natural processes. Three principles—the majority of traits are inherited—make natural selection unavoidable.
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