Fruits evolved primarily as structures specialized to disperse seeds. Fruits evolved primarily as structures specialized to disperse seeds. Seeds would have evolved to be carried far from the parent plant, so that the offspring would not have to compete with the parent for resources as they matured.
The seeds would have been carried in the digestive tracts of animals that ate the fruit, or they would have been carried by the wind or water. Fruit is also used as a signal to attract animals to consume them, helping with seed dispersal. The bright colors, appealing aromas, and sweet or sour tastes of fruit are all adaptations that make them more attractive to animals.
When the animal eats the fruit, the seeds are often left behind in feces or carried away on the animals fur, thus dispersing the offspring of the plant to new locations where they can grow without competing with the parent plant for resources.
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Which consumers are carnivores (eat meat)?
Answer:
carnivores (eat meat)
Explanation:
A(n) ________ is a non-native species that is introduced into an ecosystem and severely disrupts it by competing with native species
Answer:
Invasive Species
Explanation:
Invasive species is defined as the introduction of a non-native species or alien species that significantly affects eight disrupt or modify the ecosystem of the native species.
Such species enter new ecosystem through natural migration or by the activities of other species.
Hence, the correct answer is "Invasive Species".
What is the function of a coenzyme?
1. Binds to the substrate to raise activation energy
2. Inhibits the metabolic pathway of the enzyme
3. Couples with an enzyme to help remove or add electrons in order for the reaction to be catalyzed
4. Is a secondary protein complex that produces ATP
An aminoacyl tRNA synthase Valine is mutated so that it now attaches the amino acid glycine to the tRNA Valine instead of valine. What will happen at translation? There will be glycines at all valine positions and valines at all glycine positions. There will be valines at all glycine positions and at all valine positions. There will be valines at all glycine positions and glycines at all valine positions. There will be glycines at all glycine positions and at all valine positions. There will be no translation.
If the aminoacyl tRNA synthase for valine is mutated and attaches the amino acid glycine to the tRNA Valine instead of valine, there will be glycines at all valine positions and no translation of valine.
During translation, tRNA molecules carrying specific amino acids bind to the corresponding codons on the mRNA template, which ultimately leads to the formation of a polypeptide chain with a specific sequence of amino acids.
In this case, due to the mutation in the aminoacyl tRNA synthase for valine, glycine is attached to the tRNA Valine instead of valine.
As a result, when the tRNA Valine with attached glycine binds to the mRNA codon specifying valine, it will insert glycine instead of valine into the growing polypeptide chain.
Therefore, there will be glycines at all valine positions in the resulting polypeptide chain, and valines will be absent.
The translation process will still continue, but the resulting protein will have an altered amino acid sequence due to the incorrect incorporation of glycine in place of valine.
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what is the effect of oxidized low-density lipoproteins (ldls) in atherosclerosis
Oxidized low-density lipoproteins (LDLs) play a significant role in the development of atherosclerosis. The effect of oxidized LDLs on atherosclerosis is complex and multifaceted.
Firstly, oxidized LDLs can trigger an inflammatory response in the arterial walls, leading to the accumulation of immune cells and other cellular components. This can cause the formation of fatty streaks and plaques, which can lead to atherosclerosis.
Moreover, oxidized LDLs can also cause dysfunction in the endothelial cells lining the arterial walls. This can lead to increased permeability and adhesion of monocytes and other immune cells, leading to the formation of foam cells and further plaque formation. Additionally, oxidized LDLs can also induce smooth muscle cell proliferation and migration, contributing to the progression of atherosclerosis.
Overall, the effect of oxidized LDLs in atherosclerosis is multifactorial and involves multiple cellular and molecular pathways. Reducing oxidized LDL levels through lifestyle modifications and medications can help prevent the development and progression of atherosclerosis.
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Over 400 years ago, the bark of the cinchona tree was discovered to contain a chemical compound called quinine. Quinine was, and still is, used to cure and prevent malaria. This is an early example of __________
a. biotechnology b. scientific modeling
c. genetic engineering d. genomics
PLEASE HELP ITS A TEST
Answer:
a
Explanation:
what does hadean mean
Answer:
Hadean meaning: relating to or denoting the period when the earth was in the process of forming.
Explanation:
Hope this helps!
If not, I am sorry.
Answer:
Definition of Hadean
: of, relating to, or being the eon of history between the formation of the solar system and the formation of the first rocks on the earth — see Geologic Time Table.
Explanation:
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which of the following, if missing, would usually prevent translation from starting in eukaryotes? 5' cap 5' cap or aug codon exon aug codon
Cap-independent translation, as contrast to cap-dependent translation, can begin scanning from the 5' end of the mRNA till the start codon without the need for a 5' cap.
Is AUG the eukaryotic start codon?Prokaryotic translation also frequently allows GUG and UUG initiation in addition to AUG, but eukaryotic translation typically begins with the AUG codon.
During the beginning of eukaryotic translation, what binds the 5 cap initially?Beginning of eukaryotic translation Small ribosomal subunit and initiator tRNA (carrying methionine) form a complex that binds to the 5' cap of mRNA. complex scans to locate the start codon from 5' to 3' (AUG). Start codon is bound by initiator tRNA.
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An animal cell (left) and a plant cell (right) are shown. The outside layer of a plant cell and animal cell are labeled x. Which organelle, labeled X in the diagram, is found in both plant and animal cells? the cell wall the cell membrane mitochondrion ribosome.
In the diagram of an animal cell (left) and a plant cell (right) are shown. The outside layer of a plant cell and animal cell are labeled x. The organelle, labeled X in the diagram, that is found in both plant and animal cells is the cell membrane.The cell membrane is a semipermeable membrane that surrounds and encloses the cytoplasm of both animal and plant cells. It regulates the movement of materials such as nutrients, gases, and waste products in and out of the cell.
An animal cell is a type of eukaryotic cell that is found in animals, including humans. It contains various organelles, including the nucleus, mitochondria, ribosomes, endoplasmic reticulum, Golgi apparatus, lysosomes, and the cell membrane. Animal cells lack a cell wall but have a cytoskeleton that provides structural support and helps in cell division. The mitochondrion is the powerhouse of the cell that produces ATP, the energy currency of the cell, by aerobic respiration. The ribosome is the site of protein synthesis. The endoplasmic reticulum and Golgi apparatus are involved in protein processing and modification. The lysosome contains digestive enzymes that break down unwanted materials in the cell.
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Question 14 (2 points) The process of evolution that involves a change in the DNA sequence that leads to evolutionary change is called natural selection. O mutation. genetic drift. migration.
The process of evolution that involves a change in the DNA sequence that leads to evolutionary change is called a mutation.
A mutation is a sudden and lasting alteration in the DNA sequence that can influence genetic variation. Changes in the DNA sequence can influence phenotype, which may or may not have an effect on an organism's fitness. Mutations occur spontaneously, either from errors in DNA replication or from exposure to mutagenic agents. Mutations may happen in either coding or non-coding regions of the DNA, and they can be either silent or expressed.
Evolution is a natural process that results in the gradual change of inherited characteristics in populations over generations. It is the process of alteration in the inherited characteristics of species over successive generations. In other words, it is the process of gradual changes that happen to species over time as they adapt to their environments. It can be defined as a change in the gene frequency in a population over time.
Types of Evolution 1. Natural Selection 2. Genetic Drift 3. Gene Flow 4. Mutation 5. Non-Random Mating 6. Admixture 7. Mutation Pressure 8. Genetic Draft 9. Bottleneck and Founder Effect 10. Sexual Selection the process of evolution that involves a change in the DNA sequence that leads to evolutionary change is called a mutation.
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Suppose an asteroid had an orbit with a semimajor axis of 4 AU. How long would it take for it to orbit once around the Sun?A. 7 years
B. 8 years
C. 9 years
D. 10 years
Imagine that an asteroid's orbit had a semimajor axis of 4 AU, It would need 8 years to complete one orbit of the Sun.
To calculate the period of an asteroid's orbit, we can use Kepler's Third Law of Planetary Motion, which states that the square of the orbital period is proportional to the cube of the semimajor axis of the orbit.
Mathematically, we can express this as:
T^2 = (4^3) * k, where T is the orbital period in years, 4 is the semimajor axis in astronomical units (AU), and k is a constant of proportionality.
Simplifying, we get:
T^2 = 64k
To solve for T, we need to know the value of k, which depends on the mass of the Sun. For simplicity, we can assume a value of k = 1. Using this value, we find:
T^2 = 64
T = 8 years
Therefore, the answer is B. 8 years.
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A blood-type b woman is married to a man whose blood type is unknown. they have three children whose blood types are b, o, and ab. what is the husband's genotype?
The husband's genotype can be determined by analyzing the blood types of the children. In this case, the couple has three children with blood types B, O, and AB. From this information, we can deduce that the husband must have the genotype I^B I^O.
Blood type is determined by the presence or absence of certain antigens on the surface of red blood cells. There are four main blood types: A, B, AB, and O. Each blood type is determined by a combination of two alleles, which are variants of a gene. The alleles for blood type A are I^A and i, for blood type B they are I^B and i, for blood type AB they are I^A and I^B, and for blood type O they are i and i.
Since the woman's blood type is B, she must have the genotype I^B i. If the couple's first child has blood type B, then the husband's genotype must include the I^B allele. If the second child has blood type O, it means that the husband must have the i allele as well. Finally, if the third child has blood type AB, it means that the husband must also have the I^A allele. Therefore, the husband's genotype is I^B I^O.
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.A geneticist conducts an experiment with peas, one sample of offspring consisted of 483 green peas and 159 yellow peas. Based on these results, estimate the probability of getting an offspring pea that is green.
Report the answer as a percent rounded to one decimal place accuracy. You need not enter the "%" symbol.
prob = ____________ %
Is the result reasonably close to the value of 3/4 that was expected?
yes or no
The probability of getting an offspring pea that is green by the geneticist is 75 %.
The result is reasonably close to the expected value of 3/4, which is equivalent to 75%.
To estimate the probability of getting a green pea offspring, we can use the ratio of green peas to the total number of peas in the sample.
The total number of peas in the sample is 483 + 159 = 642.
The probability of getting a green pea offspring is given by:
Probability of green pea = Number of green peas / Total number of peas
Probability of green pea = 483 / 642
To convert this to a percentage, we multiply by 100:
Probability of green pea = (483 / 642) * 100
Calculating this value gives us:
Probability of green pea = 75.2%
The result is reasonably close to the expected value of 3/4, which is equivalent to 75%.
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the light-dependent reactions of photosynthesis result in the net oxidation of water and production of reduced ferredoxin. this process is coupled to light absorption at the two photosystems. calculate the change in free energy for the redox process and the photonic energy for the two photons (one at 680 nm and one at 700 nm). use these results in order to derive an estimate for the overall efficiency of the light-dependent reactions
The overall efficiency of the light-dependent reactions can be estimated by comparing the energy content of the produced ATP and NADPH to the total energy input from the absorbed photons.
ATP, or adenosine triphosphate, is a vital molecule found in all living organisms. It serves as the primary energy currency of cells, providing the necessary fuel for various biological processes. ATP consists of three components: a ribose sugar molecule, a nitrogenous base (adenine), and three phosphate groups.
The energy stored in ATP is released when the terminal phosphate group is enzymatically removed, resulting in the formation of adenosine diphosphate (ADP) and an inorganic phosphate molecule (Pi). This process is known as hydrolysis. When energy is required for cellular activities such as muscle contraction, active transport, or synthesis of molecules, ATP is broken down to ADP, and the released energy is harnessed to drive these processes.
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the amount and location of in the body are important predictors of cardiovascular disease risk. multiple choice question. glycogen adipose tissue muscle tissue bone
The amount and location of Adipose tissue in the body are important predictors of cardiovascular disease risk.
Adipose tissue, or body fat, is a significant risk factor for cardiovascular disease. Heart disease, stroke, and other cardiovascular diseases have been linked to the amount and location of body fat, particularly visceral fat (fat stored in and around the abdominal organs).
Unhealthy eating habits, inactivity, smoking, and alcohol abuse are the most significant behavioral risk factors for heart disease and stroke. People may experience elevated blood pressure, elevated blood glucose, elevated blood lipids, and overweight or obesity as a result of behavioral risk factors.
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(complete question))
The amount and location of ____ in the body are important predictors of cardiovascular disease risk.
What is the major difference between an endospore of a bacterium and an exospore of a fungus? 27 Answers AD A Fungal exospores are not for reproduction B Endospore of bacteria are dormant forms which are highly resistant too C Endospores are developed in all bacteria but not all fungi form exospores D Endospores are formed as a mean of reproduction in bacteri
The major difference between an endospore of a bacterium and an exospore of a fungus is that B, endospores are dormant forms which are highly resistant to environmental stresses, while exospores are not.
What are endospore and exospores?Endospores are formed by some bacteria, such as Bacillus anthracis, as a means of survival in harsh environments. They are metabolically inactive and can withstand extreme temperatures, radiation, and chemicals. When conditions improve, the endospore can germinate and the bacterium can resume its normal life cycle.
Exospores are formed by some fungi, such as actinomycetes. They are not as resistant to environmental stresses as endospores, but they can help the fungus to disperse and colonize new areas.
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If a car has a mass of 700kg and a driver pushes the car with an acceleration of 0.05m/s/s; what is the force?
Answer:
35 N
Explanation:
The formula to calculate force is:
F= m*a
So, the mass is 700 kg, and the acceleration is 0.05 m/s.
Simply multiply 700 kg* 0.05 m/s and you get 35 N.
The reason why it is newtons(N) is because that is what force is measured in.
I hope this helps.
how do plants in the desert behave to attract pollinators? responses they bloom during the day. they bloom during the day. they don't bloom. they don't bloom. they bloom day and night. they bloom day and night. they bloom at night.
The correct option is D, bloom at night. A prominent factor is that the flowers of these desert plants get pollinated during night times.
Desert plants are a diverse group of plant species that have adapted to survive in arid environments with low precipitation, high temperatures, and intense sunlight. These plants have evolved a range of physiological, morphological, and anatomical adaptations that allow them to conserve water, withstand high temperatures, and reduce water loss through transpiration.
Some common adaptations found in desert plants include succulence, where the plant stores water in its stem or leaves; reduced leaf size or the presence of spines instead of leaves, which helps to reduce water loss through transpiration; and a deep root system that allows the plant to access groundwater.
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Complete Question:
how do plants in the desert behave to attract pollinators? responses
A). they bloom during the day.
B). they don't bloom.
C). they bloom day and night. they bloom day and night.
D). they bloom at night.
Answer: D. They bloom at night.
Explanation: k12 quiz
Which element is so reactive it is found in nature only in compounds?
Group of answer choices
Na (sodium)
Au (gold)
O (oxygen)
Fe (iron)
How has our understanding of the diseases developed over time? vofr chinkpox and rabies
Our understanding of diseases has developed significantly over time, particularly with the advancement of scientific methods and technology.
What is Smallpox?Smallpox is a viral disease caused by the variola virus. It is one of the deadliest infectious diseases in history, with an estimated 300-500 million deaths in the 20th century alone. Our understanding of smallpox began to evolve in the 18th century when an English physician, Edward Jenner, observed that milkmaids who had contracted a mild form of the disease known as cowpox appeared to be immune to smallpox. Jenner then developed the first vaccine, using cowpox virus, which provided immunity to smallpox.
Through ongoing research and vaccination efforts, the disease was ultimately eradicated in 1980. Today, smallpox remains the only human disease to have been eradicated, thanks to our improved understanding of the disease and the development of effective vaccines.
Rabies:Rabies is a viral disease that affects the nervous system and can be transmitted to humans through the bite of an infected animal. Our understanding of rabies dates back to ancient times, with the earliest written records of the disease dating back to 2000 BC. In the 19th century, French microbiologist Louis Pasteur developed the first vaccine for rabies, using weakened strains of the virus.
Since then, our understanding of the disease has continued to evolve, particularly in terms of how it spreads and how it affects the body. While there is still no cure for rabies once symptoms appear, early vaccination and treatment can prevent the disease from developing.
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How is a cepheid Variable star identified?
Pulsates radically with a clear change in Luminosity
It’s luminosity dims as it rotates
It’s being torn apart by tidal forces
It’s brightness appears to change during transit
Penn foster
Answer:
lumious
Explanation:
because it luminiuos
Answer:
Explanation:
A cepheid Variable star is identified by pulsating radically with a clear change in luminosity. These stars have a regular periodicity in their pulsations, which can be used to calculate their luminosity and distance from Earth. This property makes them important tools for measuring distances in astronomy.
Part J: Relate Human Activity and Biodiversity
Do you think building eco-friendly homes that reduce greenhouse gas emissions could have positive effects on biodiversity? Explain your reasoning.
Yes, eco-friendly homes can reduce greenhouse gas emissions and have positive effects on biodiversity.
How do eco-friendly homes affect biodiversity?Biodiversity refers to the variety of living organisms, that are found in any ecosystem. During the development of the human lifestyle, there is a major loss of biodiversity is observed.
Nowadays, biodiversity is lost rapidly as a result of civilization, and different species of living organisms are becoming extinct because of pollution, habitat loss, invasive species, overuse, etc.
Therefore, eco-friendly homes that reduce greenhouse gas, by using natural things could have positive effects on biodiversity.
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Biological substrates that are associated with depression include all of the following except ______.
norepinephrine
serotonin
cortisol
acetylcholine
Biological substrates that are associated with depression include all of the following except acetylcholine.
Depression is one of the most common mental disorders, and it is thought to result from a combination of biological, environmental, and social factors. Neurotransmitters, hormones, and brain regions are all involved in the biological basis of depression.
Biological substrates that are associated with depression include the neurotransmitters norepinephrine and serotonin, as well as the hormone cortisol. Norepinephrine and serotonin are both monoamine neurotransmitters that play a role in mood regulation, and they have been implicated in the pathogenesis of depression. Cortisol is a hormone produced by the adrenal glands that is involved in the stress response.
Acetylcholine, on the other hand, is not generally associated with depression. Acetylcholine is a neurotransmitter that is involved in cognitive functions such as attention, memory, and learning, as well as in the autonomic nervous system. It is more commonly associated with disorders such as Alzheimer's disease and Parkinson's disease than with depression.
In conclusion, all of the following biological substrates are associated with depression except acetylcholine.
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There are several mechanisms through which reproductive isolation occurs. Which situation is an example of behavioral isolation?
A.
Mules, the offspring of a male donkey and a female horse, are unable to reproduce because they are sterile.
B.
The reproductive organs of snails only properly align when the male and female belong to the same species.
C.
Males of different, closely related species of fireflies signal for mates by flashing different light sequences.
D.
Red and purple sea urchins cannot reproduce with one another because the sperm and egg cannot fuse.
What effects does the human population have on the environment
Answer:
An increase in population will inevitably create pressures leading to more deforestation, decreased biodiversity, and spikes in pollution and emissions, which will exacerbate climate change.
if the trp codons in the trpl gene were mutated to encode another amino acid, what would the result be?
The genes trpA-E will not be transcribed if there is no tryptophan present. Only the genes trpE codons and trpD will be transcribed in the absence of tryptophan. The trp repressor would be freed and the mutant leader region would permit complete expression, resulting in the trp operon being produced at its highest levels in the absence of tryptophan.
Genes are transcribed when the repressor protein does not bind to the operator. codons area refers to a DNA sequence that codes for proteins. The operon on the genes chromosome codons contains the five coding areas for the tryptophan biosynthesis enzymes.
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Why is astrology referred to as a pseudoscience?
Answer:
Astrology has not demonstrated its effectiveness in controlled studies and has no scientific validity, and is thus regarded as pseudoscience.
Explanation:
Group the phrases according to the type of cell they describe.
Group 1 -Eukaryotic
Group 2 -Prokaryotic
Group 3 -Both
Options
1-Can have rigid cell walls
2-Genes float free cytoplasm
3-Contains organelles
4-Divides by mitosis
5-Genes enclosed in nucleus
6-Bacteria
Answer:
1. Both
2. Prokaryotic cells
3. Eukaryotic cells
4. Eukaryotic cells
5. Eukaryotic cells
6. Prokaryotic cells
Eukaryotic cells have true nuclei. Prokaryotic cells do not have a true nucleus.
What is eukaryotic cell?Eukaryotic cell have rigid cell walls. In prokaryotes the genes flow free in cytoplasm. Eukaryotes contain organelles. Prokaryotes do not contain organelles.
Eukaryotic cell divides by mitosis. In eukaryotic cell genes are enclosed in a nucleus. Bacteria are prokaryotic cell.
A prokaryotic cell is a straightforward, one-celled (unicellular) organism that is devoid of a nucleus or any other organelle that is membrane-bound. Soon, it will become clear that this is very different in eukaryotes. The nucleoid, a dark area in the center of the cell, is where prokaryotic DNA is located.
Therefore, Eukaryotic cells have true nuclei. Prokaryotic cells do not have a true nucleus.
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how the overfishing of a single species, such as the fish eaten by sea lions,
can affect an entire ecosystem.
Answer:
This can cause an extinction in that entire species of animals and sea lions would then resort to something else to eat and if they don’t find food to eat they can starve and so on
In what organelle does photosynthesis
occur?
Chloroplast
Ribosome
Nucleus
Mitochondria
Answer:
chloroplast is the answer