Answers
Answer:
D. All of the above
Explanation:
Evolution by natural selection involves organisms being better suited to their environment as a result of the occurrence of changes in traits to enable it to reproduce more or have a higher chance of survival.
An example of evolution by natural selection involves Arctic Foxes changing coat color in the winter from brown to white, Lung fish being able to survive out of the water and Pigeons nesting and living in an urban environment.
Related Questions
True or False: Psychoanalysis/Psychodynamic theory emphasizes that what happened to
you in childhood, along with unconscious material we are unaware of,
significantly shape our personalities.
Answers
Psychodynamic theory emphasizes that what happened to you in childhood, along with unconscious material we are unaware of
significantly shape our personalities.
The statement is true.
How do we explain?When we look at these theories, early experiences and unresolved conflicts from childhood can influence our thoughts, emotions, and behaviors in adulthood, often operating at an unconscious level.
Psychoanalysis, developed by Sigmund Freud, proposes that understanding and resolving unconscious conflicts can lead to personal growth and psychological well-being.
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The primer for DNA synthesis is an RNA molecule formed by the enzyme ________________.
a. primase
b. polymerase
c. helicase
d. topoisomerase
Answers
Answer:
Primase
Explanation:
Primase is a form of RNA polymerase enzyme that is involved in DNA replication which catalyses the production of small segment of DNA or RNA called primer complimentary to a short stranded DNA template.
The RNA molecule is later removed by 5' to 3' exonuclease and the DNA later filled it and occupy the position.
How can fossils help us
understand the Earth's history?
Answers
Answer: By studying fossils, we can tell how long someone has been on the earth for.
Explanation: We can easily learn where they lived, how they lived, and their past.
Topic 1 - Describe what occurs at a divergent plate boundary. What happens at a transform plate boundary? Compare and contrast the types of processes that can occur at a convergent plate boundary.
Topic 2 - List five factors that can influence how long global supplies of a given mineral will last, and explain how each might increase or decrease the time span the mineral will be available to us.
Answers
Topic 1:
At a divergent plate boundary, tectonic plates move apart, creating a gap where magma rises and forms new crust.At a transform plate boundary, plates slide past each other horizontally, causing earthquakes but no crust creation or destruction.Topic 2:
Factors affecting mineral supply: discovery, technology, recycling, politics/economics, and substitution impact availability and longevity.
At a divergent plate boundary, two tectonic plates move away from each other due to convection currents in the underlying mantle. As the plates separate, magma rises from the asthenosphere and fills the gap, creating a new crust.
This process is known as seafloor spreading when it occurs beneath the ocean, leading to the formation of mid-oceanic ridges. On land, divergent boundaries can result in the formation of rift valleys.At a transform plate boundary, two plates slide horizontally past each other. This movement is characterized by shear stress and can cause earthquakes when the plates become locked and then suddenly slip. The San Andreas Fault in California is a well-known example of a transform plate boundary.Convergent plate boundaries involve the collision or subduction of two tectonic plates.There are three types: oceanic-oceanic convergence, oceanic-continental convergence, and continental-continental convergence. The type of processes that can occur at a convergent plate boundary include subduction, volcanic activity, mountain formation, and the creation of trenches.
Topic 2:
Factors influencing the longevity of global mineral supplies can include geological factors, technological advancements, recycling efforts, population growth, and consumption patterns.
Geological factors play a significant role in determining how long global supplies of a mineral will last. The size and quality of mineral deposits, as well as the rate of extraction, can impact their longevity. Technological advancements can either increase or decrease the time span a mineral will be available. Improved mining techniques can access previously inaccessible deposits, while more efficient use of minerals can extend their lifespan.Recycling efforts can greatly affect the availability of minerals. Increased recycling rates can reduce the need for new extraction and extend the lifespan of global mineral supplies. Population growth and consumption patterns also influence the demand for minerals. As the global population grows and economies develop, the demand for minerals increases, potentially depleting supplies more rapidly.In conclusion, the longevity of global mineral supplies is influenced by geological factors, technological advancements, recycling efforts, population growth, and consumption patterns. Each of these factors can either increase or decrease the time span during which a mineral will be available to us.
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The products of photosynthesis serve as substrates for aerobic respiration, while those of aerobic respiration are utilised in photosynthesis. Considering the substrates and products of these two biological processes, discuss how they feed into one another.
Answers
Photosynthesis and aerobic respiration are two essential biological processes that are intimately connected, as they provide the basis for energy flow in most living organisms. Photosynthesis is the process by which plants and some other organisms convert light energy into chemical energy in the form of organic molecules, while aerobic respiration is the process by which cells break down organic molecules to release energy in the form of ATP (adenosine triphosphate).
The products of photosynthesis, which are organic molecules such as glucose and other sugars, serve as substrates for aerobic respiration. During aerobic respiration, these organic molecules are broken down by a series of enzymatic reactions, releasing energy that is used to generate ATP. This energy is used by the cell to carry out various metabolic processes and perform work.
On the other hand, the products of aerobic respiration, which are carbon dioxide (CO2) and water (H2O), are utilized in photosynthesis. During photosynthesis, plants and other organisms take in CO2 from the atmosphere and use it, along with water and light energy, to produce organic molecules such as glucose. This process is facilitated by a group of pigments called chlorophyll, which are located in the chloroplasts of plant cells.
Therefore, the substrates and products of photosynthesis and aerobic respiration feed into one another, creating a continuous cycle of energy flow. The organic molecules produced during photosynthesis provide the energy necessary for cells to carry out aerobic respiration, while the products of aerobic respiration are used in photosynthesis to produce more organic molecules. This cycle helps to ensure that the energy needs of living organisms are continuously met and that the environment remains in balance.
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The term ______ refers to all chemical reactions occurring in the body.
respiration
assimilation
digestion
metabolism
Answers
Answer: metabolism
Explanation:
Many people think that metabolism is just the process of creating energy, but it is so much more than that. However, any chemical process that occurs in the body with the idea of being life-sustaining is considered metabolism. The rate of metabolism varies from person to person, with some people having faster metabolism than others.
The term metabolism refers to all chemical reactions occurring in the body. Therefore, option D is correct.
Metabolism contains a wide range of processes involved in the conversion of nutrients into energy, the synthesis of molecules needed for cellular activities, and the breakdown of substances for elimination.
Metabolism is of two types and that is anabolism and catabolism. Catabolic reactions involve the breakdown of larger molecules into smaller ones, releasing energy in the process. Anabolic reactions involve the synthesis of larger molecules from smaller components, requiring energy input.
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A stratified squamous epithelium is a stratified epithelium with squamous (flattened and scale-like) epithelial cells in the top layer.
Answers
A single thin layer of flattened cells to irregular boundaries makes up simple squamous epithelium. Those who line the walls of blood vessels and the lungs' air sacs. They also participate in physiological processes such as osmosis and diffusion.
A stratified squamous epithelium is a stratified epithelium with squamous (flattened and scale-like) epithelial cells in the topmost layer. Cuboidal or columnar cells may be found in the deeper layers. Some stratified squamous epithelia are heavily keratinized, while others are barely or not at all.
Squamous cells are thin, flat cells that resemble fish scales and are found in the skin's surface, the lining of hollow organs, and the lining of a respiratory and digestive tracts. Protective functions of stratified squamous epithelium include protection against microorganisms invading underlying tissue and/or protection against water loss. A single basal layer contains stem cells, 2-3 layers of proliferative basaloid cells in the suprabasal region, as well as larger keratinized cells near the surface.
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Which of the following is NOT one
of the four main types of tissues?
A. epithelial tissue
B. lung tissue
C. connective tissue
Answers
Use the data in the table to suggest why the doctor should NOT prescribe pencillin.
Answers
Answer: The doctors should not prescribe penicillin because bacteria become resistant to penicillin over time.
Explanation:
Penicillin is used as a therapy for bacterial infections. The synthesis of the enzyme penicillinase, which disintegrates the penicillin molecule and renders it useless, is what led to the development of the resistance in bacteria.
Penicillin was administered to patients with throat infections. It was observed that the patients developed immunity to the antibiotic and rendered it ineffective.
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11
marium
12
Na Mg
24305
Calcium
20
scandum
21
19
K
Ca
Sc
44956
39 052
rubidium
27 6
Part 1 Name two elements that have the same properties as sodium
Answers
Answer:
Lithium,Potassium
.....
What abiotic factors affect the
oceans?
Answers
Which of the following are correct statements about α:β t cells?
-Developing T cells die by apoptosis if they exhibit weak or no binding to sel-MHC molecules
-It occurs in the thymic cortex
-It requires epithelial cells that bear surface complexes of self peptides and self-MHC molecules
Answers
The correct ones are:
A very small proportion of developing T cells emigrate from the thymus as mature T cells.Mature T cells circulate continuously through the blood, secondary lymphoid organs, lymph, and back to the blood.Mature T cells have a longer half-life than mature B cells.T cells of the lymphocyte type. T cells are white blood cells in the immune system that play an important role in the adaptive immune response. T cells are distinguished from other lymphocytes by the presence of a T-cell receptor on their surface.
T cells are formed from hematopoietic stem cells found in bone marrow. T cells that are maturing migrate to the thymus gland. T cells get their name from the thymus. The precursor cells differentiate into various types of T cells after migrating to the thymus. Even after they leave the thymus, T cells continue to differentiate.
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In the enzyme reaction above, catechol is the substrate, oxygen is a reactant, catechol oxidase is the enzyme, benzoquinone is the product, and water (H2O) is a by-product. Which of the following will decrease the rate of this reaction?
(A) Reducing the amount of water
(B) Reducing the amount of catechol
(C) Increasing the amount of catechol oxidase
(D) Increasing the amount of benzoquinone
Answers
The following will decrease the rate of this reaction option B. Reducing the amount of catechol.
In the enzyme reaction you described, reducing the amount of catechol will decrease the rate of the reaction. As catechol is the substrate, it binds to the active site of catechol oxidase, the enzyme, to facilitate the reaction. A lower concentration of catechol would result in fewer substrate molecules available to interact with the enzyme, leading to a slower reaction rate.
Reducing the amount of water (option A) is not likely to affect the reaction rate significantly, as water is a by-product and does not play a direct role in the reaction mechanism. Increasing the amount of catechol oxidase (option C) would typically increase the reaction rate, as there would be more enzyme molecules available to bind with catechol, speeding up the process.
Finally, increasing the amount of benzoquinone (option D) might have minimal effect on the reaction rate, as it is a product, and any potential impact through product inhibition would depend on specific reaction dynamics.
In summary, reducing the amount of catechol, the substrate is the most likely option to decrease the rate of the enzyme reaction involving catechol oxidase. Therefore, the correct option is B.
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Why do oestrogen levels between 8and 22days remain low in the women who takes contraceptive pills
Answers
Contraceptive pills suppress ovulation and keep oestrogen levels low throughout the menstrual cycle, preventing pregnancy.
The contraceptive pill contains synthetic hormones that mimic the effects of oestrogen and progesterone in the body.
These hormones work to suppress the natural production of oestrogen by inhibiting the release of follicle-stimulating hormone (FSH) and luteinising hormone (LH) from the pituitary gland.
This prevents ovulation and therefore reduces the levels of oestrogen that are normally produced during the menstrual cycle.
The low levels of oestrogen between days 8 and 22 of the menstrual cycle in women taking contraceptive pills are due to the fact that this is the time when oestrogen levels would normally peak in a natural menstrual cycle.
However, as ovulation is suppressed by the pill, there is no need for the body to produce high levels of oestrogen to support the development of the ovarian follicle.
Instead, the pill maintains a consistent level of synthetic hormones throughout the cycle, which prevents the fluctuation of oestrogen levels that would occur naturally.
Therefore, women who take contraceptive pills typically have lower levels of oestrogen throughout their menstrual cycle.
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Describe the relevant structure of the tissues
Answers
Answer:
Tissues are groups of cells that work together to perform a specific function. The structure of tissues can vary depending on their function, but there are some general features that are common to many tissues.
Species 1 is described as 2n = 8 and has chromosome composition BBDDEEHH.
Species 2 is described as 2n = 10 and has chromosome composition NNPPSSXXZZ.
Select the best answer to classify the organism below based on its chromosome composition. Note that each letter represents a chromosome and that the organism below is either an individual from one of the species above or is derived from one or both species above.
Organism: NNPPPSSXXZZ
Select one:
a. Trisomic
b. Autotetraploid
c. Haploid
d. Autotriploid
e. Diploid
f. Allotriploid
g. Double Trisomic
h. Monosomic
i. Nullisomic
j. Double Monosomic
k. Allotetraploid
Answers
Answer:
a. Trisomic
Explanation:
A trisomy is a genomic phenomenon whereby a particular chromosome is present in three copies. In this case, the trisomy involves the chromosome P, being this species a tetraploid with 5 pairs of homologous chromosomes (2n = 10). In humans, the trisomy for chromosome 21 is one of the most common types of aneuploidies that lead to the Down syndrome by producing alterations in gene expression patterns that are associated with changes in the phenotype
What does the moon not have on its own?
O rotational period
O gravity
O revolution period
Olight
Answers
The Moon can only be seen as a result of the Sun's light reflecting off it. It does not produce any light of its own.
The moon does not produce any light on its own, and can be seen of reflection from sun light
Below is Bohr model of an Atom. Scientists have claimed that the nucleus
of the atom is positively charged. In 3 - 5 sentences, describe a test (or an
experiment) to prove that this claim is true.
Answers
Answer:
Bohr claimed that the nucleus is positively charged . Though nucleus have protons and neutrons. Neutrons are neutral particles as they have no charge but protons are positively charged .
Active transport of fluid and electrolytes across the cellular membrane typically requires?
Answers
Active transport requires energy in the form of ATP conversion, carrier proteins, or pumps in order to move ions against the concentration gradient.
Active transport of fluids and electrolytes across the cell membrane normally requires the expenditure of energy (eg, in the form of ATP) to move a substance against its concentration gradient.
Active or passive transport?Passive transport is a great strategy for moving molecules into or out of the cell. It's cheap, easy, and all the cells have to do is stop and let the molecules diffuse.
In active transport, as opposed to passive transport, the cell expends energy (eg, in the form of ATP) to move a substance against its concentration gradient.
With this information, we can conclude that the active transport of fluids and electrolytes across the cell membrane normally requires the expenditure of energy (eg, in the form of ATP) to move a substance against its concentration gradient.
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Current Event on Biology Discussion
Find a news article with a publication date not older than 2018 about biology. List the website that vou found it on. List the author. List the publication date. Tell who was affected by the research and why do you think the research was important. Where was the research conducted. Summarize the article. Does the article remind you of anything? If it does what? Was there anything in the article that you wanted to know more about? If so what? If not why?
Answers
Which correctly lists three characteristics that are used to describe air? altitude, density, radiation O density, radiation, mass Omass, pressure, density Opressure, altitude, radiation
Answers
Answer:
The Correct Answer Is C
Explanation:
All Three Aspects are related to Air.
Air has mass, applies pressure, and takes up space. Therefore, option (C) describes the characteristics of air.
What is air?Air has particular qualities or features and is a mixture of gases, water vapor, and other elements. Gases make up air, which has mass, pressure, and weight as well as the ability to be compressed and be affected by temperature.
Nearly all of the air is made up of the molecules of two separate elements, nitrogen and oxygen. Carbon dioxide and argon, in trace levels, make up the remainder. (Trace amounts of other gases, including neon, helium, and methane, are also present.)
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Both energy and matter can be neither ___________________ nor
_______________________.
Answers
Answer:
destroyed, created
Explanation:
or vice versa
Answer:
Both energy and matter can be neither Created nor
Destroyed.
Explanation:
The first law of thermodynamics, also known as Law of Conservation of Energy, states that energy can neither be created nor destroyed; energy can only be transferred or changed from one form to another.
The law of conservation of matter and energy states that matter makes up all visible objects in the universe, and it can be neither created nor destroyed.
Due to following properties silk is
often used in the medical field for
wounds and burns
Answers
Answer:
Recent research examined clinical applications using silk because of its ability to promote adhesion and proliferation of various cells including keratinocytes and fibroblasts[12,13]. In this study, we found silk dressing materials effective as burn dressing.
Explanation:
How does interphase prepare cells for mitosis?
Options in photo
Answers
Answer:
Growth of cell and replication of DNA
2. Pea plants can have yellow (Y) or green (y) peas. They can also have round (R) or wrinkled (r) pea pods.
Cross pea plants heterozygous for both traits.
a. List the genotypes of the parent plants (P1 generation).
b. List the gametes from the parent plants that were created by meiosis.
c. List the possible phenotypes of the offspring.
d. What is the phenotypic ratio?
I don’t get this at all. Pls help!!!
Answers
The right response is (a) Both the green wrinkled and the yellow round letters stood for YYRR.
What distinguishes dominant and recessive alleles?Based on how they influence organisms heterozygous for two different alleles, alleles are categorized as dominant or recessive. The recessive allele, which is not visible in the phenotype of heterozygotes, is "dominated" in heterozygotes by the dominant allele, which influences the phenotype.
Two recessive phenotypes are present in the green, wrinkled parent, indicating homozygosity for both the pea hue and pea shape alleles. This is consistent with the yyrr genotype. Two dominant phenotypes are present in the round, yellow parent, and both genes must have at least one dominant allele. Any of the genotypes YYRR, YYRr, YyRR, or YyRr could be this. However, only option (a) accurately identifies the genotype of the parent who is green and wrinkled among the choices (a) and (b) that reflect potential genotypes for this parent. As a result, option (a) is the right one.
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Full Question = In pea plants, yellow peas (Y) are dominant to green (y) and round peas (R) are dominant to wrinkled (r). Two pea plants were crossed, one with yellow round peas and one with green wrinkled peas. What were the genotypes of the parents?
a. The yellow round was YYRR and the green wrinkled was yyrr.
b. The yellow round was YyRr and the green wrinkled was YyRr.
c. The yellow round was yyrr and the green wrinkled was YYRR.
d. The yellow round was YYrr and the green wrinkled was yyRR.
The rate at which alcohol is eliminated from the body may be increased by?
Answers
Alcohol Elimination Rate can be increased by food intake.
Alcohol is a toxic substance that once consumed enters the bloodstream via the walls of the small intestine.Alcohol is metabolized mainly by the liver, in an oxidation reaction to acetaldehyde, which is a toxic metabolite. A minor percentage (2 to 5%) of alcohol is excreted unchanged in urine, sweat, and breath.Alcohol dehydrogenase is an enzyme produced in the liver that metabolizes ethanol to acetaldehyde.It has been shown that the alcohol elimination rate can be increased by food intake, regardless of composition.It has been suggested that different types of foods can induce an increase in the hepatic blood flow, thereby also increasing the activity of alcohol-metabolizing enzymes.In conclusion, alcohol elimination can be increased by food intake.
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Imagine that the gene shown in the picture is for a receptor in the cell membrane that can initiate a cell signalling pathway.
Exon 1 is the part of the protein that can activate a second messanger inside the cell in response to a signal molecule.
Exon 3 and 4 are both locations on the protein that face the extracellular space (outside of the cell). Exon 3 and 4 have different shapes so bind different signal proteins.
Describe how the function of these 3 different versions of the protein are similar and how the functions would be different.
Your answer must use the actual functions of the different exons in your answer
Answers
Exon 1 of the protein is responsible for activating a second messenger inside the cell in response to a signal molecule. Exons 3 and 4 are two different locations on the protein that face the extracellular space and have different shapes, allowing them to bind to different signal proteins.
The three versions of the protein differ in their ability to recognize and bind to different signal molecules. The version of the protein encoded by the first mRNA transcript, which contains all three exons, can bind to two different signal molecules due to the presence of both exon 3 and exon 4.
The version of the protein encoded by the second mRNA transcript, which lacks exon 3, can only bind to one signal molecule. The third version of the protein, which lacks exon 4, can bind to a different signal molecule than the other two versions of the protein.
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Summarize the findings of other scientists in Germany and Boston that support the work of Calderon-Garciduenas
Answers
Calderón-Garcidueñas has conducted research on the impact of air pollution on the brain and cognitive function. Other scientists in Germany and Boston have also conducted studies that support her work and findings.
In Germany, a group of researchers conducted a study to investigate the effects of air pollution on brain structure and cognitive function in a large population of older adults. The study utilized neuroimaging techniques to assess brain volumes and cognitive tests to evaluate cognitive performance. The findings revealed a significant association between long-term exposure to air pollution and reduced brain volume in regions related to memory and learning. The study also found that higher levels of air pollution were associated with poorer cognitive performance in various domains.
In Boston, researchers focused on the impact of air pollution on children's brain development. They conducted a study involving a cohort of children and assessed their cognitive abilities using standardized tests. The study found that children exposed to higher levels of air pollution exhibited lower cognitive scores, particularly in areas related to attention, memory, and language skills. The researchers also observed structural changes in the brain, specifically in regions involved in cognitive control, in relation to air pollution exposure.
These studies from Germany and Boston provide additional evidence supporting Calderón-Garcidueñas' findings regarding the detrimental effects of air pollution on the brain and cognitive function. They reinforce the notion that long-term exposure to air pollution can lead to structural changes in the brain and have a negative impact on cognitive abilities. The collective findings highlight the importance of addressing air pollution as a public health concern and implementing measures to reduce pollution levels to safeguard brain health and cognitive development, particularly in vulnerable populations such as children and older adults.
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16. Many plants have dermal tissue with a waxy cuticle covering the entire surface of the leaf. How is this structuralaspect of the dermal tissue beneficial to the function of the leaf?A. It increases the rate of transpiration from the surface of the leaf.B. It provides a suitable landing surface for insect pollinators.C. It inhibits water loss from the surface of the leaf, which aids in photosynthesis.D. It magnifies the amount of light absorbed into the surface of the leaf during photosynthesis.
Answers
Plant cuticle
The main function of this structure is to create a waxy layer eternal to the plant to protect it from desiccation to which it is exposed in the atmosphere.
Therefore, the correct answer is option C.
Which of the following is a prokaryotic cell, a plant cell, liver cell, muscle cell, paramecium, or bacterium
Answers
Answer:
Bacteria is an example of prokaryotic cell.
Explanation:
if IT helped uh please mark me A BRAINLIEST :))Answer:
bacterium
Explanation:
A bacteria is a prokaryotic cell as it lacks a membrane bound nucleus and other internal structures plus it's unicellular in nature...