Scientists estimate that the fossils found so far represent probably ____ of all species that have ever lived.
Answers
Answer:
1%
Explanation:
The number of species known about through fossils is less than 1% of all species that have ever lived. Because hard body parts are more easily preserved than soft body parts, there are more fossils of animals with hard body parts, such as vertebrates, echinoderms, brachiopods, and some groups of arthropods.
Related Questions
2. What is the role, if any, of the following processes mediating water reabsorption by the kidneys:
A. passive transport
B. active transport processes
C. cotransport with ions
D. exchange with ions
E. osmosis
Answers
The process of water reabsorption in the kidneys is facilitated by various mechanisms, including active and passive transport processes, cotransport with ions, and exchange with ions. Osmosis also plays a critical role in this process. Let's discuss each process in detail: Passive transport: This is a process that requires no energy and is driven by the concentration gradient. Water reabsorption occurs passively when the concentration of water in the filtrate is greater than the concentration of water in the renal interstitial fluid.
Active transport: This is a process that requires energy to move solutes from low to high concentration regions. In the case of the kidney, the Na+/K+ ATPase pump moves sodium out of the tubule cells and into the interstitial fluid. Cotransport with ions: This is a process in which two or more molecules move across the membrane together. The glucose transporter is an example of a cotransporter that uses the Na+ gradient to move glucose into the tubular cells. Exchange with ions: This is a process in which one ion is exchanged for another ion across the membrane. For example, hydrogen ions are exchanged for sodium ions.
Osmosis: Osmosis is a process that involves the movement of water molecules across a semipermeable membrane from an area of low solute concentration to an area of high solute concentration. In the kidney, osmosis plays a critical role in water reabsorption from the tubules.
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A team of scientists think they discovered a new organism while exploring Brazil. Upon bringing the specimen back to their lab in Atlanta, they observe the specimen for several weeks. They take a sample from the specimen to observe it under a microscope and see the sample is composed of many small compartments containing what appears to be nuclei. They shine a bright light to the left of the specimen and observe it slowly turn itself towards the light over multiple days. What further evidence would support that the newly discovered specimen is alive?
Answers
Answer:
Explanation:
Response of the organism to chemicals
when some particular chemicals are spilled when they are alive they have the ability to detect it so they either move away or closer to it. Moving further away signifies that life is in the organism and that the chemical maybe toxic to it health., some bacteria respond to chemicals
Response to touch, when there is life the organism will likely respond to touch, it can move away from the place trying to find another place to hid or stay.
what are all the decomposers in the ocean?
Answers
Answer:
crustaceans and mollusks, bacteria, fungi, sea cucumbers, starfish, sea urchins, and other kinds of marine worms.
Explanation:
21. An offspring of two parents had an extra chromosome in its karyotype. The most likely cause of this condition would have
been (1 point)
A.a point mutation
B.translocation
C.nondisjunction
D.a nonsense mutation
Answers
The correct answer is option C. non-disjunction.
An aberrant number of chromosomes in all cells, known as aneuploidy, or in some cells, known as mosaicism, are caused by nondisjunction. Trisomy of autosomes, or chromosome 21, is the cause of Down's syndrome where an extra copy of chromosome 21 is present. A point mutation is a type of genetic modification in which only one nucleotide base from the DNA or RNA sequence of an organism is altered, added, or removed. Example, a single point mutation in the beta hemoglobin gene is the primary cause of sickle cell anemia. Hence, its incorrect. Translocation is a phenomena that causes chromosomes to reorganize themselves in an unexpected way. Hence, its incorrect. When a DNA sequence alteration results in a stop codon rather than a codon that specifies an amino acid, it is known as a nonsense mutation. A truncated protein that is probably useless is produced as a result of the new stop codon's existence. Its also incorrect.Hence, the correct answer is C. nondisjunction.
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Which two changes would you expect as a result of a severe drought that wipes out several plant populations? A. Decreased resource availability among herbivores B. Increased resource availability among herbivores C. Decreased competition among herbivores D. Increased competition among herbivores
Answers
A severe drought that wipes out several plant populations would have significant ecological consequences, particularly for herbivores that rely on these plants for food. Two changes that can be expected as a result of such a drought are option A and D.
A. Decreased resource availability among herbivores: With the loss of plant populations, there would be a decline in the overall availability of resources, such as leaves, fruits, and seeds, which herbivores depend on for sustenance. This scarcity of food would lead to a decrease in the amount of resources available for herbivores, potentially resulting in malnutrition, decreased population sizes, and increased vulnerability to predation and disease.
D. Increased competition among herbivores: As the number of plant populations decline, herbivores will have to compete for the limited remaining resources. With fewer plants to sustain them, more herbivores will be forced to rely on the remaining patches of vegetation, intensifying competition for food. This increased competition can lead to heightened aggression, territorial disputes, and a higher likelihood of injury or death among herbivores.
These changes can have cascading effects throughout the ecosystem. Decreased resource availability among herbivores may result in reduced prey availability for predators that rely on herbivores, potentially impacting their populations as well.
Increased competition among herbivores can disrupt the balance of herbivore communities and alter grazing patterns, affecting plant species composition and overall ecosystem dynamics. Therefore the correct option is A and D
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Niche-
Describe a specific organisms niche found in the Gobi Desert
Answers
Answer:
Desert Niches
Adaptations include a species' selection of food, water and shelter as well as other facts of its behavior. Niches within desert ecosystems include open desert scrub, open grasslands, washes and sandy soils.
Explanation:
You are working with a research group and discover fossils of large animal. Upon close examination, it looks to be a mammal and an ancestor to the modern tiger, that you temporarily name 'Species X' until you learn more about it. Using your knowledge of the fossil record, you attempt to determine its relative age. You know that ______ evolved before species X, ______ had already evolved and gone extinct before species X evolved, and ______ did not evolve until after species X went extinct.
A. Winged insects, Dinosaurs, Humans
B. Humans, Dinosaurs, Flowering plants
C. Dinosaurs, Invertebrates, Land plants
D. Trilobites, Reptiles, Birds
Answers
how does direct sunlight affect an area
Answers
failure to cite a compete reference for your claim is called a) proof surragate, b) hasty generalization, c) ancedotal exvidence, d) biased generization
Answers
The correct option is D : Biased generization, failure to cite a compete reference for your claim is called Biased generization
Citations also indicate that you have done the correct research work and that you've read acceptable books for your task. Failure to cite simply indicates that you are claiming that the entire document and all of its material as yours and, if that's accurate, it's plagiarism.
Anytime you copy and paste verbatim from a source and do not give the source credit it is plagiarism.
If you do copy and paste a piece word for word, you must put the content in quotes (i.e. " ") marks and provide credit to the author. This is termed a direct quotation.
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CH2OH О, a CH3 H OH OH Н он Identify the macromolecule pictured above. O a Ob Protein Carbohydrate Lipid , ос Od Nucleic Acid
Answers
Answer:
Although the pictorial representation is not clear but the question can be answered based on the known structure of each biomolecule. The answer is:
Carbohydrate
Explanation:
Carbohydrate is one of the four biological molecules in living systems. Carbohydrates are composed of long chains of carbon, hydrogen and oxygen in a 1:2:1 ratio i.e (CH2O)n empirical formula.
The structure of carbohydrate is composed of a ketone (C=O) or aldehyde (CHO) functional group and hydroxyll groups (OH). The simplest unit of any carbohydrate is called a monosaccharide. Hence, from the above structure in the question, which consists of long chain of carbon, hydrogen and oxygen atoms, it can be identified as a CARBOHYDRATE.
Describe how a renewable resource could become a nonrenewable resource
Answers
Answer:
Renewable resources can become nonrenewable resources if they are used faster than they can be replenished. If the resource no longer exists, there is nothing to regenerate or be replenished. For example, if we cut down trees faster than we grow them, trees can become a nonrenewable resource because there are no trees to regenerate.
Explanation:
Is squash a annual, biennial, or perennial?
Answers
Answer:
They are annual
Explanation:
They grow in the warmer months every year.
These cells have been found at the end of a pathway lined with the above cells and help absorb oxygen.
What type of organ do you expect to have tissues made up of the above cells and why?
Answers
Answer:Human body tissue makes up organs and other body parts. There are four main types of tissue: muscle, epithelial, connective and nervous. Each is made of specialized cells that are grouped together according to structure and function. Muscle is found throughout the body and even includes organs such as the heart.
As we saw above, every organ is made up of two or more tissues, groups of ... Image credit: modified from Types of tissues:
Explanation:
Mark as brainlist please btw i hope the answer helps you have a great day
a single-celled eukaryote that is both photosynthetic and a chemoheterotroph is a(n)
A. kinetoplastid.
B. ciliate.
C. euglenid
D. dinoflagellate
E. apicomplexan
Answers
A single-celled eukaryote that is both photosynthetic and a chemoheterotroph is a(n): C. euglenid
Euglenids are a group of protists that possess characteristics of both plants and animals. They are typically unicellular organisms that can undergo photosynthesis in the presence of light, utilizing chloroplasts to produce energy. However, when light is not available, euglenids can also act as chemoheterotrophs, obtaining nutrients by absorbing organic matter from their environment. This dual mode of nutrition sets them apart from other options listed. Kinetoplastids, ciliates, dinoflagellates, and apicomplexans have different characteristics and modes of nutrition, making them distinct from a single-celled eukaryote that is both photosynthetic and a chemoheterotroph.
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1. In what types of foods is the protein content the highest?
Answers
Answer:
Meat, fish, poultry, eggs, legumes, and soy products like tofu or tempeh.
Explanation:
They all have a lot of protein.
Have a great day ^^
Explanation:
- Legumes
- Dairy
- Meat
- Seafood
fill in the blank. the ________ is the protective chamber that houses the ovule and later matures to become the fruit.
Answers
The term you're looking for is "ovary." The ovary is the protective chamber that houses the ovule and later matures to become the fruit.
Here's a step-by-step explanation: In flowering plants, the reproductive structure is called a flower.The female reproductive part of a flower is known as the pistil, which consists of the stigma, style, and ovary.The ovary is located at the base of the pistil and contains one or more ovules.When a flower is pollinated, pollen grains land on the stigma and germinate, producing a pollen tube that extends down the style to reach the ovary.The sperm cells from the pollen grain then move through the pollen tube and fertilize the egg cell within the ovule.Once fertilization occurs, the ovule develops into a seed, and the ovary surrounding it begins to grow and mature.As the ovary matures, it turns into a fruit, which provides protection and nutrients for the developing seeds and facilitates seed dispersal.So, to complete the sentence: The ovary is the protective chamber that houses the ovule and later matures to become the fruit.For more such question on ovary
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What outer structure is found in both eukaryotic and prokaryotic cells that acts as a boundary between the outside environment and inside the cell?.
Answers
The outer structure that is found in both eukaryotic and prokaryotic cells, which acts as a boundary between the outside environment and inside the cell, is called the cell membrane.
The cell membrane is a thin, flexible layer made up of lipids and proteins. It serves as a protective barrier, controlling the movement of substances in and out of the cell. The cell membrane also plays a vital role in maintaining the cell's shape and providing structural support. In addition to the cell membrane, eukaryotic cells also have an additional outer structure called the cell wall, which provides further protection and support.
The presence of a cell wall is not a feature shared by all eukaryotic cells, as it varies across different organisms. Overall, the cell membrane is a crucial component found in both eukaryotic and prokaryotic cells, ensuring the cell's integrity and regulating its interactions with the external environment.
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Match the terms used in naming muscles according to size.
Answers
Muscles sizes and their correct terms are as follows;
minimus, Smallest muscle
minor, small muscle
longus, Long muscle
maximus Largest muscle
major large muscle
brevis Short muscle
What are some examples of muscles that fits the above description?The vastus maximus is the largest muscle in the thigh.
The biceps brachii is a long muscle in the upper arm.
The soleus is a short muscle in the calf.
And the palmaris brevis is the smallest muscle in the hand.
The above answer is in response to the full question;
Match the terms used in naming muscles according to size.
minimus, abdominis, longus, maximus, minor, medius, minorand brevis
large, largest, long, small, smallest short.
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which cells engluf foreign particles that reach the lungs
Answers
The cells that engluf foreign particles that reach the lungs are alveolar macrophages. These are immune cells that patrol the alveoli (air sacs) of the lungs and engulf any foreign particles that enter. They also produce cytokines and chemokines to help activate other immune cells if an infection is detected.
Macrophages are white blood cells that engluf foreign particles that reach the lungs. Macrophages are part of the immune system and they are responsible for engulfing and destroying any foreign particles, such as bacteria and viruses, that enter the body. The macrophages use a process called phagocytosis to engulf the particles.
In phagocytosis, the macrophage first engulfs the foreign particle by extending pseudopods, or small projections, around it. The pseudopods then fuse together to form a phagosome, which encloses the foreign particle. The phagosome then fuses with a lysosome, which is a vesicle containing digestive enzymes. The digestive enzymes break down the foreign particle, and the macrophage then absorbs the fragments.
The macrophages then move the fragments to the lymph nodes, where they are presented to other cells of the immune system. This triggers an immune response, which causes the body to produce antibodies against the foreign particle. The antibodies recognize the foreign particle and bind to it, effectively neutralizing it.
In addition, macrophages also release cytokines, which are molecules that help regulate the immune response.
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In your own words (do not copy and paste from above, or anywhere else), describe the
difference between a gene and an allele?
Answers
Answer:
In a more simpler term, the allele is just an variant form of a gene but in a more detailed explanation: each gene stays in a specific place on a chromosome in two copies. One copy inherited from each parent, but the copies or not really the same.
Explanation:
I majored in Biology
Primate observation is useful to the study of human evolution because: Humans evolved out of modern chimpanzees and gorillas All primates walk upright as we do They provide insight into shared physical and behavioral traits due to common ancestry It shows how species unrelated to us can develop complex behavior on their own
Answers
Primate observation is useful to the study of human evolution because it provides insight into shared physical and behavioral traits due to common ancestry.
Observing primates, our closest living relatives, allows researchers to study their physical and behavioral characteristics, which can shed light on our own evolutionary history. While it is incorrect to say that humans evolved out of modern chimpanzees and gorillas, we share a common ancestor with them. By studying primates, we can identify similarities and differences in their anatomy, locomotion, social structures, and cognitive abilities, which can help us understand the evolutionary processes that shaped our own species. This comparative approach provides valuable evidence for reconstructing the evolutionary pathways that led to the development of unique human traits. Furthermore, primate observations also provide insights into how species unrelated to humans can independently develop complex behaviors and adaptations, expanding our understanding of the diversity of life on Earth.
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Which of the following cannot reliably prevent the impact of hurricanes on hurricane-prone places?
A)
restoring freshwater marshes
B)
allowing the growth of a natural buffer of trees
C)
completely preventing settlements in areas that seem prone to catastrophes
D)
encouraging people to avoid settling in areas known to be hazardous
E)
using satellite images to predict hurricanes
Answers
Answer:
I think the answer is d I hope this help
Answer:
A) restoring freshwater marshes
Explanation:
got it right on edg
Which of the following causes point mutation?A. DeletionB. InversionC. Both A and BD. None of the above
Answers
Point mutation occurs when a single nucleotide is deleted. Inversion is a type of chromosomal mutation in which a chromosomal region is reversed end to end. Correct option (a).
A mutation is a change in the nucleic acid sequence of an organism's, virus's, or extrachromosomal DNA's genome.
Viral genomes can be made up of either DNA or RNA. Mutations occur as a result of errors in DNA or viral replication, mitosis, or meiosis, or other types of DNA damage (such as pyrimidine dimers caused by ultraviolet radiation exposure), which may then undergo error-prone repair (especially microhomology-mediated end joining), cause an error during other forms of repair or cause an error during replication (translesion synthesis).
Mutations can also occur as a result of the insertion or deletion of DNA segments caused by mobile genetic elements.
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4
Select the correct answer.
Jonathan is starting to grow facial hair, his voice is deepening, and he's showing other signs of puberty. Which stage of development is he likely
in?
OA.
middle childhood
OB. late childhood
Ос.
adolescence
OD. young adult
Answers
Answer:
Adolescence
Explanation:
(of a young person) in the process of developing from a child into an adult.
Answer:
adolecents are teenagers and teenagers get puberty
Explanation:
An oceanographer discovered new seafloor being formed in the ocean at a divergent fault. The scientist classifies this as a trench. Is the scientist correct or incorrect and why or why not? (3 points)
A. He is incorrect. Trenches are narrow openings occurring at subduction zones.
B. He is incorrect. Trenches are flat areas at the foot of continental shelves.
C. He is correct. Trenches are ancient volcanoes whose tops have eroded away.
D. He is correct. Trenches are areas between continental shelves and deeper ocean floors.
Answers
Answer:
A
Explanation:
The other person is slightly correct.
Trenches are long and narrow openings in the crust, with steep sides, that usually occur above a subduction zone.
Therefore A is the correct answer
are all african lions the same species
Answers
Answer:
Yes, They are all the same species.
Explanation:
However there are many sub species
What do stick bugs eat?
Answers
Answer: Leaves
Explanation: All walking sticks are herbivores. They use their strong mandibles to consume leaves , the primary food in their diet. When camouflage isn't enough, some species have evolved the ability to release foul-smelling chemicals to deter predators, and others can secrete a liquid that temporarily blinds their foes.
Answer:worms mollusks and other invertebrates
Explanation: they eat invertebrates because it will be easy for them to eat and not as easy as vertebrates
If you were to go into space, your _____ would stay the same, but your _______ would change. Question 14 options: Weight, Mass Inertia, Magnitude Hairstyle, Net Force Mass, Weight.
Answers
Space is the region of the universe outer to the planet. If anyone is sent to space then their mass remains the same but weight changes.
What are weight and mass?Weight includes the mass and the gravitational acceleration. It gets altered in space because the gravity differs at space and planets and hence the weight being dependent on gravity will be changed in space.
Mass is the product of the density and volume of the object occupied in a specified place. The mass of the object does not depend on gravity and hence does not get altered in space.
Therefore, the correct blanks are option D. mass and weight.
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What happens if there is no oxygen in cellular respiration of glucose?
Answers
The common location deep in the brain where sensory pathways of secondary neurons synapse with tertiary neurons to transfer information to various areas of the primary somatosensory cerebral cortex is the
Answers
The common location deep in the brain where sensory pathways of secondary neurons synapse with tertiary neurons to transfer information to various areas of the primary somatosensory cerebral cortex is the thalamus.
The thalamus acts as a relay center for sensory information, receiving signals from secondary neurons and relaying them to tertiary neurons, which then send the information to the appropriate areas of the primary somatosensory cerebral cortex for processing. This process allows us to perceive and interpret sensations such as touch, temperature, and pain.
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