The discovery of ancient mammoth DNA dating to 10,500 years ago indicates that woolly mammoths survived beyond the time of significant human influence, suggesting that other factors may have driven their extinction.
Explanation:The piece of evidence from the passage that supports the theory that humans may not have been responsible for the extinction of the woolly mammoth could be C. the discovery of traces of ancient mammoth DNA in Alaska dating to 10,500 years ago. This evidence indicates that woolly mammoths survived beyond the time when humans grew in number and began to have a substantial impact on their environment. This suggests that other factors - such as rapid climate change or disease - may have played a significant role in the mammoths' extinction.
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Select the situation bellow that would produce a total Displacement of zero. A. A trip to the moon and then to Mars B. A horse galloping from one end of a field to another C. The criss-crossing path of a bug as it flies from flower to flower D.A round-trip ride to school and back
Answer:
D.A round-trip ride to school and back
Explanation:
A round-trip ride to school and back would produce a total Displacement of zero.
You start and stop at the same place.
Hope this helps!
Nucleic acids offer variability because they contain alternate forms of genes called .
Hello, I believe your answer should be alleles.
Alleles are alterenate forms of genes.
Physical characteristics of down syndrome
The rise of methicillin-resistant Staphylococcus aureus (MRSA) can be considered to be an example of artificial selection because A) humans purposefully raise MRSA in large fermenters in an attempt to make the bacteria ever-more resistant. B) S. aureus is cultivated by humans to replenish the soil with nutrients. C) humans synthesize methicillin and create environments in which bacteria frequently come into contact with methicillin. D) Humans are becoming resistant to bacteria by taking methicillin.
Answer:
C
Explanation:
Frequent exposure of Staphylococcus aureus methicillin by humans – such as through excessive use of non-prescribed antibiotics-, the rate of mutations in the bacteria population increases. This results to increases chances that a mutant will develop that is resistant to methicilin. Once a mutant develops, its population increases even when exposed to the antibiotic because it is resistant to methicilin. Bacteria also exchange genetic material horizontally so the gene for resistance will quickly spread in a population. This results in MRSA that is hard to eradicate.
Final answer:
The correct answer is C) Humans synthesize methicillin and create environments that inadvertently select for methicillin-resistant Staphylococcus aureus (MRSA), representing artificial selection. This emphasizes the need for careful antibiotic management to combat the rise of drug-resistant strains like MRSA.
Explanation:
The rise of methicillin-resistant Staphylococcus aureus (MRSA) can be considered an example of artificial selection because C) humans synthesize methicillin and create environments in which bacteria frequently come into contact with methicillin. This does not imply an intentional breeding program like what might be suggested by option A, rather it is the consequence of the use of antibiotics like methicillin in medicine which has inadvertently favored the survival of resistant bacterial strains. Unlike natural selection, artificial selection in this context refers to human actions that have inadvertently encouraged the proliferation and evolution of antibiotic-resistant bacteria.
The emergence of MRSA has caused significant concern within the medical community because the strain is resistant to a range of commonly used antibiotics, thereby presenting a real threat of serious infections that are difficult to treat. Moreover, MRSA's ability to transfer genes conferring resistance to other bacteria, potentially becoming a 'superbug', adds to the urgency in managing the use of antibiotics and developing measures to counteract resistance.
Where does water that seeps into the ground collect
A. Bedrock
B. A divide
C. An aquifer
D. A watershed
Answer:
I think it would be an aquifer.
Explanation:
When creating a graph, the ____________ goes on the x axis and the _____________ goes on the y axis. A. dependent variable, independent variable B. experimental group, control group C. independent variable, dependent variable D. control group, experimental group
C. independent variable, dependent variable
What is Graph?
A graph is a mathematical representation of a network and it describes the relationship between lines and points. A graph consists of some points and lines between them. The length of the lines and the position of the points do not matter. Each object in a graph is called a node.
There are many different types of graphs, such as
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Accuracy in the translation of mRNA into the sequence of amino acids in a polypeptide depends on specificity in which of the following?
1) binding of ribosomes to mRNA 2) shape of the A and P sites of ribosomes 3) attachment of amino acids to tRNAs 4) bonding of the anticodon the codon and the attachment of amino acids to tRNAs
Final answer:
The accuracy of protein synthesis during translation relies on the attachment of the correct amino acids to tRNAs and the proper pairing of tRNA anticodons with mRNA codons.
Explanation:
Accuracy in the translation of mRNA into the sequence of amino acids in a polypeptide depends specifically on the attachment of amino acids to tRNAs and the subsequent bonding of the anticodon to the codon. During the process of translation, the ribosome facilitates the correct matching of tRNA anticodons with mRNA codons. Each tRNA has an anticodon that is complementary to an mRNA codon, and it carries a corresponding amino acid.
When the tRNA anticodon base pairs correctly with the mRNA codon, the ribosome catalyzes the formation of a peptide bond between the present amino acid and the growing polypeptide chain. This precise anticodon-codon interaction ensures the correct sequence of amino acids in the resulting protein.
An inflammation of the kidney, most commonly caused by toxins, infection, or an autoimmune disease, is called
Answer:
It's called "Nephritis."
Explanation:
Hope my answer has helped you!
Fossils_____. Disprove evolution form whenever an organism dies can only form when organisms are buried alive support evolution because they show changes in an organisms structure
AnswerDISENEGRATE
Explanation:
Which of the following types of stars is most likely to end up as a supernova?
In Graph A, the curve peaks at 800 nm, in the red section of the visible light spectrum. In Graph B, the curve peaks at 550 nm, in the green section of the visible light spectrum. In Graph C, the curve peaks at 450 nm, in the blue section of the visible light spectrum. In Graph D, the curve peaks at 300 nm, in the violet section of the visible light spectrum.
A
B
C
D
Answer:
The answer is graph D
Explanation:
In terms of star type, Massive stars or Blue Supergiants are most likely to become supernovae after they fully consume their fuel and experience gravitational collapse. The data mentioned in the question doesn't have connectivity with being a supernova.
Explanation:The question asks which type of star is most likely to end up as a supernova. However, the information provided about different spectral curve peaks doesn't reign relevant to this question. That said, to answer the question in the astronomical context, the statement can be made - Massively large stars are most likely to end up as a supernova. Analogously, if you categorize stars by their types, Massive stars, particularly Blue Supergiants, are most likely to become supernovae after they exhaust their nuclear fuel and experience gravitational collapse. The enormous energy of this collapse causes the outer layers of the star to explode, creating the supernova.
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In what ways are the respiratory structures of all animals similar?
which of the items below would describe the genotype of an individual?
A.blue eyes
B.Bb
C.brown fur
Answer:
I believe c
Explanation:
How does your autonomic nervous system use feedback to keep you healthy?
A. It makes you perspire after danger has passed.
B. It decreases your hearing after danger has passed
C. It speeds up your heart rate to help you deal with danger.
D. It slows down your breathing to help you deal with danger
Answer:it speeds up your heart rate to help you deal with danger.
Explanation:
Why are phosphates a critical part of life
Answer:
Phosphates are critical part of life because of the diverse roles they perform in the lives of living organisms, especially in DNA and RNA molecules.
Phosphates are formed from two elements, phosphorus and oxygen. Phosphorus is a very important element that play a crucial roles in the formation of bones and teeth. It is also plays vital roles in carbohydrate metabolism, fat metabolism, protein synthesis and repair of worn out tissues. Oxygen on the other hand is required for oxidation of biological fuel and for breathing.
Phosphates are usually formed from one atom of phosphorus and four atoms of oxygen, it has the chemical formula PO4. Phosphate is an important component of DNA and RNA molecules, phosphates hold these molecules together. Phosphate molecule is also found in ATP, which is the energy currency of living cells.
What is the purpose of chloroplasts?
Answer:
Chloroplasts are the food producers of the cell. They are only found in plant cells and some protists. Animal cells do not have chloroplasts. Every green plant you see is working to convert the energy of the sun into sugars. Plants are the basis of all life on Earth. They create sugars, and the byproduct of that process is the oxygen that we breathe. That process happens in the chloroplast. Mitochondria work in the opposite direction and break down the sugars and nutrients that the cell receives.
Explanation:
Answer:
Chloroplasts work to convert light energy of the Sun into sugars that can be used by cells. The entire process is called photosynthesis and it all depends on the little green chlorophyll molecules in each chloroplast. Plants are the basis of all life on Earth. They are classified as the producers of the world.
if an organism displays a trait or does not display a trait,what can we say about that trait?
A.it is polygenic
B.it has mutated
C.it is controlled by one gene
Answer:
THE ANSWER WOULD BE A
Explanation:
Answer:
C. it is controlled by one gene
Explanation:
NOT A.
i had the same question on my acellus so i know it's c
Index fossils are fossils of organisms that ____.
Question 6 options:
lived over a short period of time
are not easily recognized
are not widely distributed geographically
are scarce
Answer:
They were spread over a wide area, and lived over a short period of time
Explanation:
Index fossils are fossils that are used to date back geologically.
Answer: Option (1)
Explanation: Index fossils are those fossils which were present only for a short period of time and had wide geographical distribution. This fossils plays an important role in the correlation of rocks i.e two same rocks appearing at two different places, as well as, it helps in the determination of the age of rock. For example, ammonites.
Thus, the correct answer is option (1).
Lily is researching the light-sensing rod cells of the eye. She decides to use stem cells to produce new rod cells. Which statement best explains why Lily is using stem cells for this purpose?
A. Specific genes in a rod cell’s DNA can be activated to produce new stem cells.
B. Specific genes in a stem cell’s DNA can be activated to produce new rod cells.
C. All genes in a rod cell’s DNA are activated, so new stem cells are produced each time the cell divides.
D. All genes in a stem cell’s DNA are activated, so new rod cells are produced each time the cell divides.
E. None of the genes in a rod cell’s DNA are activated, so new rod cells can be produced only from stem cells.
Answer:
answer is b
Explanation:
Lily is researching the light-sensing rod cells of the eye, and she decides to use stem cells to produce new rod cells because specific genes in a stem cell’s DNA can be activated to produce new rod cells, which is presented in Option B.
What is the importance of the stem cell in an individual?The stem cell is more undifferentiated than the differentiated cell type, and when stimulated, it can produce a specific cell type, such as when the rod cell stimulus is applied, the rod cell genes are activated, and the stem cell can produce the rod cell, and based upon the types, there are many types of the stem cell.
Hence, Lily is researching the light-sensing rod cells of the eye, and she decides to use stem cells to produce new rod cells because specific genes in a stem cell’s DNA can be activated to produce new rod cells, which is presented in Option B.
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What are the pros and cons of transect sampling?
Hello again!
PRO: Transects are used when you wish to illustrate a particular gradient or linear pattern along which communities of plants and, or animals change. They provide a good way of being able to clearly visualize the changes taking place along the line. Depending on how detailed the line transect is, they can usually be accomplished fairly quickly.
CON:Literally the exact opposite.
Welcome :D
Answer:
read
Explanation:
pros -
They provide a good way of being able to clearly visualize the changes taking place along the line.Depending on how detailed the line transect is, they can usually be accomplished fairly quickly.It can be used to monitor a change in an area over time.cons -
It is not always easy to identify where best to undertake the transect walk, the transect may actually not represent a common picture of the area/ community. It’s often not representative of all the organisms in the habitat.A red blood cell placed in pure water would ________.
Hello There!
A red blood cell placed in pure water would "BURST"
This is because water would move in the red blood cell and become hypotonic. It does not have enough space so thats why it bursts.
A red blood cell placed in pure water would undergo hemolysis, leading to the swelling and bursting of the cell.
When a red blood cell is placed in pure water (a hypotonic solution), water molecules move into the cell through the process of osmosis. Red blood cells contain a semi-permeable membrane that allows water to pass through but restricts the movement of larger molecules and ions.
As water molecules enter the cell, the concentration of water inside the cell increases compared to the surrounding solution. This causes the cell to swell and expand as it tries to equalize the concentration of solutes inside and outside the cell.
However, red blood cells have a finite capacity to expand due to the rigidity of their membrane. When the cell swells beyond its limit, the cell membrane eventually ruptures or bursts, leading to the release of cellular contents into the surrounding environment. This process is known as hemolysis.
Hemolysis can be detrimental in certain medical conditions, such as in cases of severe water intoxication or when patients are administered hypotonic intravenous fluids. In contrast, if a red blood cell is placed in a hypertonic solution (one with a higher solute concentration than inside the cell), it would undergo crenation, where water moves out of the cell, causing it to shrink and become distorted. Maintaining the proper balance of water and solutes is crucial for the normal functioning and integrity of red blood cells and other cells in the body.
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The genetic code is essentially the same for all organisms. Based on this information, one can logically assume which of the following statements to be correct? a. DNA was the first genetic material. b. The same codons in different organisms translate into the different amino acids. c. Different organisms have different numbers of different types of amino acids. d. A gene from an organism can theoretically be expressed by any other organism. e. All organisms have experienced convergent evolution.
Answer:
D
Explanation:
The same genetic code that all organisms share indicates that a gene from any organism can theoretically be expressed by any other organism, due to the universality of genetic coding and conservation of codons. This suggests a common origin for all life on earth.
Explanation:The genetic code being the same for all organisms means that, regardless of the organism, the same codons are used to code for the same amino acids. This is due to the conservation of codons. The correct assumption would be: d. A gene from an organism can theoretically be expressed by any other organism. In other words, because of the universality of the genetic code, a gene that encodes a protein in one species could theoretically be transplanted into any other species where it would still produce the same protein. For example, if an mRNA encoding the horse's globin protein was transferred to a tulip cell, the tulip would synthesize horse globin. That there is only one genetic code is compelling evidence that all life on Earth shares a common origin, underscored by the fact that there are approximately 1084 possible combinations of 20 amino acids and 64 triplet codons.
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What's a recharge area? A. The part of an aquifer where surface water reaches the water table B. The part of an aquifer that's located between two aquiclude C. The part of an aquifer that's located at a lower elevation D. The part of an aquifer where groundwater meets a lake or stream
Answer:
A. The part of an aquifer where surface water reaches the water table
Explanation:
The aquifers are underground natural reservoirs of water, mostly freshwater, though there are also some with saline water. The aquifer both gets water from outer sources, and it also loses water, be it in a natural way, or because of the human activities. The recharging is the manner in which the aquifer gets its water replenished. The recharging area is the area where the surface water manages to reach the aquifer, thus providing it with fresh, new reserves of water.
Based on the diagram above, which best describes the structure and function of C?
A) Hollow organ that contains and nourishes the embryo and fetus
B) Muscular tube into which egg cells are released for fertilization
C) Narrow passage that transports the egg from the uterus to the vagina
D) Sexual gland in which egg cells are formed and stored until ovulation
Answer:
Answer is A.
Explanation:
C is pointing out the uterus, which is described in option A.
A is pointing out the ovary, which is described in option D.
B is pointing out the fallopian tube, which is described in option B.
Option C describes the cervix, which is not labeled in the diagram.
Summarize DNA's importance to you A. Contains your brain B. Produce energy for your body C. DNA contains the instructions for who you are. D. Make up cells that allow you to reproduce
Answer:
C
Explanation:
DNA is what makes us each human and different!
in a vegetable garden 45 bean plants have been eaten by deer 5 are untouched what is the frequency of bean plants in the garden that have been eaten?
Answer:
90%
Explanation:
Frequency of bean plants in the garden that have been eaten can be calculated as the total number of bean plants eaten divided by the total number of all bean plants in the garden.
Given that:
Number of bean plants eaten = 45; number of bean plants uneaten = 5
Total number of bean plants in the garden = 45 + 5 = 50
Therefore, frequency of bean plants in the garden that have been eaten = 45/50 = 0.9 = 90%
Frequency of bean plants eaten in the garden by the deer = 90%
Answer:
90%
Explanation:
Biology Help!
The conversion of inorganic carbon to organic carbon by plants during photosynthesis is known as _[blank]_.
filtration
immigration
reabsorption
primary production
Answer:
The conversion of inorganic carbon to organic carbon by plants during photosynthesis is known as REABSORPTION...
The conversion of inorganic carbon to organic carbon by plants during photosynthesis is known as REABSORPTION. Thus, option "C" is correct.
How Kidneys play an important role in the urine formation?Kidneys play an important role in urine formation, the body's homeostasis and getting rid of the body from the excretory waste products. The three main processes of urine formation is glomerular filtration, absorption and tubular secretion.
The absorption of water in the proximal convoluted tubule is important and necessary for osmosis maintenance and is termed as obligatory water reabsorption. The water reabsorption in the distal convoluted tubule is under the ADH control and termed as facultative water reabsorption.
Thus, option "C" is correct.
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Drag the tiles to the boxes to form correct pairs.
Match the structures of the male reproductive system to their functions.
seminal vesicles
testes
scrotum
penis
epididymis
protection and temperature maintenance of the testes
storage and maturation of sperm
production of sperm and testosterone
delivery of sperm to female reproductive system
production of fluid that nourishes sperm
Answer:
Matched functions of structures of male reproductive system are:
Semi vesicles: Production of fluid that nourishes sperm
Testes: Production of sperm and testosterone
Scrotum: Protection and temperature maintenance of the testes.
Penis: Delivery of sperm to female reproductive system
Epididymis: Storage and maturation of sperm
Answer:
Seminal Vesicles - production of fluid that nourishes sperm
testes - production of sperm and testosterone
scrotum - protection and temperature maintenance of the testes
penis - delivery of sperm to female reproductive system
epididymis - storage and maturation of sperm
Explanation:
Seminal vesicle - It is a pair of accessory gland present in male reproductive system along with other glands called prostate gland and cowper's gland. It is tube like, coiled structure and lies behind the bladder. The main part of the ejaculate is due to the secretion of viscous fluid from seminal vesicle. It contains fructose, citric acid, inositol and prostaglandins.
Testes - These are situated outside the abdominal cavity in a sac like structure called scrotum. It is the primary reproductive organ involved in production of sperms and the male androgen called testosterone.
Scrotum - It helps to maintain the lower temperature of the testes which is needed for spermatogenesis i.e. synthesis of sperms. Testes descends into the scrotal sac during the 7th month of fetal development.
Penis - delivery of sperms occurs through penis, an erectile copulatory organ. It helps in depositing the semen into the female reproductive system. It is the male external genitalia and is made up of spongy tissue.
Epididymis - It is the place where sperms are stored temporarily. It is an extratesticular duct system where maturation of sperms occur.
The peripheral nervous system _____
A. consists of all body nerves
B. Includes the brain and spinal cord
C. Is composed of two types; somatic and autonomic
D. Is subdivided into four parts
Answer:
A. consists of all body nerves
Explanation:
The peripheral nervous system consists of all body nerves.
This is an organism that relies on other organisms for its food and energy supply; also called a heterotroph.
Final answer:
Organisms that depend on other creatures for sustenance and energy are known as heterotrophs, or consumers. They cannot photosynthesize and include animals, fungi, and some bacteria and plants. Energy-wise, they rely on autotrophs like plants that synthesize their own food.
Explanation:
Heterotrophs and Consumers
An organism that relies on other organisms for its food and energy supply is called a heterotroph. These organisms, also known as consumers, cannot produce their own food through processes like photosynthesis. Consequently, they must eat or absorb organic material from other living things, including plants and animals. Heterotrophs play a vital role in ecosystems and can be classified based on their dietary habits into groups such as herbivores, carnivores, omnivores, and decomposers.
Heterotrophs include a wide range of organisms like all animals, fungi, many protists, and bacteria. These consumers show great diversity, but they all share a dependence on autotrophs (organisms that produce their own food using sunlight, such as plants and algae) for their energy. This connection means that the energy heterotrophs use can be traced back to autotrophs and the process of photosynthesis. Without autotrophs, heterotrophic life on Earth would not be able to sustain itself.
Which of the following statements does NOT correctly describe tissue perfusion in the cardiovascular system?
a. Perfusion of the kidneys is important for urine formation.
b. Autonomic nervous system regulation of blood pressure is an example of extrinsic control of tissue perfusion.
c. The myogenic response is an example of extrinsic control of tissue perfusion.
d. Accumulation of local metabolites triggering dilation of arterioles is an example of intrinsic control of tissue perfusion.
Final answer:
The statement that incorrectly describes tissue perfusion is that the myogenic response is an example of extrinsic control, while it is an example of intrinsic control. Other options given correctly describe aspects of tissue perfusion involving kidney function, autonomic nervous system regulation, and local metabolite accumulation. So the correct option is c.
Explanation:
You asked which statement does NOT correctly describe tissue perfusion in the cardiovascular system. The correct answer is that the myogenic response is an example of intrinsic control of tissue perfusion, not extrinsic. Hence, the statement that does NOT correctly describe tissue perfusion is:
c. The myogenic response is an example of extrinsic control of tissue perfusion.The myogenic response is a reaction to the stretching of the smooth muscle in the walls of arterioles in response to changes in blood flow through the vessel. It serves as a protective function to maintain homeostasis, trying to keep blood flow and pressure within certain limits to prevent damage to organs and tissues.
Here are the explanations for the other options that do correctly describe tissue perfusion:
Perfusion of the kidneys is important for urine formation as it involves the filtration of blood, removing waste and excess substances to produce urine.Autonomic nervous system regulation of blood pressure, such as through the release of epinephrine and norepinephrine, is an extrinsic control mechanism affecting tissue perfusion.Accumulation of local metabolites triggering dilation of arterioles is indeed an intrinsic control of tissue perfusion, helping regions with increased metabolic activity receive more blood.