a certain type of plant produces blue or yellow flowers. during a fire, many yellow flowers were destroyed. now only blue flowers are produced. select one: a. gene flow b. natural selection c. nonrandom mating d. mutations e. genetic drift
Answers
Certain plants have blue or yellow flowers. A lot of yellow flowers were burnt in the fire. Currently only blue flowers are produced by genetic drift
Genetic drift is the random change in all the frequency of the genetic variants present within the population. Genetic drift can completely eliminate genetic variants, thereby reducing genetic variation. It can also cause alleles that were originally rare to become more common and even more fixed. . Genetic drift can completely eliminate genetic variants, thereby reducing genetic variation. Also, initially rare alleles can become more common and even become fixed. Genetic drift is the drifting of all the frequency of the an allele relative to that of the other alleles in the population over time as the result of the chance or the random event
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Related Questions
The Florida panther was once considered to be a subspecies of cougars. Current scientists, however, have studied the Florida panther and removed the subspecies classification
Which of the following would explain why the classification of the Florida panther changed?
A.) New genetic evidence suggests a much closer relationship between the Florida panther and other cougars
B.) Advanced technologies have shown a large difference in cell structure between the Florida panther and other cougars.
C.) Study of their embryos shows major differences in the development of the Florida panther fetus when compared to other cougars
D.)Shared physiological features
between the Florida panther and other cougars were also found in newly discovered organisms in the world.
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What do plant cells use to get energy from the sun
Answers
Answer:
Photosynthesis
Explanation:
Plant cells obtain energy through a process called photosynthesis. This process uses solar energy to convert carbon dioxide and water into energy in the form of carbohydrates.
the wings of thysanoptera can best be characterized as being a) halteres b) tegmina c) elytra d) hair- or feather-like e) membraneous.
Answers
The wings of Thysanoptera, commonly known as thrips, can best be characterized as being e) membranous.
The forewings of thrips are larger and longer than the hindwings, which are divided into two pairs. Both sets of wings have a membranous look because to their thinness, fragility, and transparency. The fine hairs called setae that cover the wings add to their fragile structure. These setae contribute in flight control and give sensory data.
Thrips can fly and move through a variety of habitats because to their membrane wings. Thrips are extremely agile fliers with the ability to maneuver quickly and precisely despite their small size. For their feeding, mating, and dispersal activities, their wings enable them to hover, dart, and change direction quickly.
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A______ is a genetic characteristic that allows an organism to survive and reproduce.
a. Adaptaion
b. Adaptation
c. Fat
d. Organism
Answers
Answer:
A
Explanation:
Adaption is the ability of a living organism to survive and reproduce in a particular environment.
how can u tell wether or not a
glass is cold
u cantt
Answers
Answer:
Explanation:
Umm well if it's cold and filled with water then the outside will get water residue and maybe even have water drop down the side. This is just a guess
36. In a population of butterflies, the bright yellow ones were easy for predators to spot than the light yellow ones. Two
generations later, each butterfly is light yellow. What is this an example of?
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Answer: This is called natural selection.
Explanation:
Which adaptations allowed reptiles to complete their life cycles on land? an amniotic egg lungs four legs ectothermic metabolism
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Answer: The amniotes are distinguished from amphibians by the presence of a terrestrially adapted egg protected by amniotic membranes. The amniotes include reptiles, birds, and mammals. A key adaptation that permitted reptiles to live on land was the development of scaly skin. I hope this helps
Explanation:
explain what happens to the ecosystem and environment of an area if the suns raid iron is reduced
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After intense activity, your muscles feel sore because of
the accumulation ofNAD+ B-
the accumulation of ATP
C- the accumulation of lactic acid D- the accumulation of carbon dioxide
Answers
Answer:
After intense activity, your muscles feel sore because of _____. a) the accumulation of NAD+ b) the accumulation of lactic acid c) the accumulation of ATP d) the accumulation of carbon dioxide. B. ... ATPc "carbon planet," because carbon is the central element in organic compounds. ... After intense activity, your muscles feel sore because of a. the accumulation of NAD+. b. the accumulation of lactic acid. c. the accumulation of ATP. d. the accumulation of carbon dioxide. b. the accumulation of lactic acid.
Explanation:
srry if this dosent help
How many alleles are in the gene pool?
1
2
3
Or 4
Answers
Answer:
3 Alleles
Explanation:
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The face says brainliest please!
How are soluble food molecules absorbed into the epithelial cells of the small intestine
Answers
Soluble food molecules are absorbed into the epithelial cells of the small intestine through the process of diffusion and active transport.
Muscle cells make up muscle tissues, which are attached to each other and to bones. The main function of muscle cells is to move body parts and organs. They do this by contracting and relaxing, which changes the length and shape of the cells. This process uses several proteins and requires a lot of energy.
Which is the best prediction about the cell structures of muscle cells?
A.
Muscle cells have a large volume of cytoplasm so that the cell can easily change shape.
B.
Muscle cells contain a large number of mitochondria in order to provide more energy.
C.
Muscle cells do not have nuclei because they do not need to produce proteins.
Answers
It can be seen on a cladogram that modern birds and reptiles share a common ancestor. Select the piece of evidence that best supports this idea. Reptiles are also related to mammals. Birds have evolved into many groups. Feathers are a derived characteristic that first evolved in reptiles. Birds have the derived characteristic of being warm blooded, like mammals.
Answers
The evidence supporting the idea that modern birds and reptiles share a common ancestor is that feathers are a derived characteristic that first evolved in reptiles. Feathers represent an evolutionary derived trait.
In evolutionary biology, an autapomorphy is a distinctive phenotypic trait referred to as a derived trait, which is unique to a particular group/taxon.
The derived traits are phenotypic features that arise during the evolution of a particular taxonomic group.
These traits (derived traits) differ from the phenotypic trait of the ancestor of the group.
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Answer:
The evidence supporting the idea that modern birds and reptiles share a common ancestor is that feathers are a derived characteristic that first evolved in reptiles. Feathers represent an evolutionary derived trait.
In evolutionary biology, an autapomorphy is a distinctive phenotypic trait referred to as a derived trait, which is unique to a particular group/taxon.
The derived traits are phenotypic features that arise during the evolution of a particular taxonomic group.
These traits (deri
Explanation:
Identify each of the following as an example of a scientific theory, a model, or a hypothesis. - In order to determine how muscles work, a biophysicist imagines that certain muscle proteins are tiny springs and measures how "stretchy" they are. This is a - A medical doctor sees some improvements in cancer patients when they are given a new drug, so the doctor thinks that the new drug may be helpful to treat cancer. This is a - Einstein developed a series of ideas and equations to explain gravity as a curvature in space and time; numerous experiments and observations have given results consistent with his ideas and equations. This is a - The flow of blood through a blood vessel is treated as the flow of a liquid through a long, straight pipe. This is a Why is it important for biologists and people in biology-related fields to learn physics? Select all that are correct. To learn how to solve complex problems To learn how to communicate scientific ideas To learn how to apply fundamental principles with logic and reasoning To learn how to plug numbers into equations and calculate answers To learn how to use math in science and make estimates To learn how to interpret and apply different representations of information To learn how to interpret quantitative measurements
Answers
- In order to determine how muscles work, a biophysicist imagines that certain muscle proteins are tiny springs and measures how "stretchy" they are. This is a model.
- A medical doctor sees some improvements in cancer patients when they are given a new drug, so the doctor thinks that the new drug may be helpful to treat cancer. This is a hypothesis.
- Einstein developed a series of ideas and equations to explain gravity as a curvature in space and time; numerous experiments and observations have given results consistent with his ideas and equations. This is a scientific theory.
- The flow of blood through a blood vessel is treated as the flow of a liquid through a long, straight pipe. This is a model.
It is important for biologists and people in biology-related fields to learn physics because:
- To learn how to solve complex problems
- To learn how to communicate scientific ideas
- To learn how to apply fundamental principles with logic and reasoning
- To learn how to interpret and apply different representations of information
- To learn how to interpret quantitative measurements
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Identify the following situations as a hypothesis, a theory, or a model.
i. In order to determine how muscles work, a biophysicist imagines that certain muscle proteins are tiny springs and measures how "stretchy" they are.
ii. Einstein developed a series of ideas and equations to explain gravity as a curvature in space and time; numerous experiments and observations have given results consistent with his ideas and equations.
iii. A medical doctor sees some improvements in cancer patients when they are given a new drug, so the doctor thinks that the new drug may be helpful to treat cancer.
A) i. - hypothesis; ii. - theory; iii. - model
B) i. - model; ii. - theory; iii. - hypothesis
C) i. - theory; ii. - hypothesis; iii. - model
D) i. - model; ii. - hypothesis; iii. - theory
E) i. - theory; ii. - model; iii. - hypothesis
Which microfossils are useful for paleotemperature determination
using the oxygen isotope ratios of their shells?
Answers
The microfossils that are useful for paleotemperature determination using the oxygen isotope ratios of their shells are foraminifera.
Foraminifera are tiny marine animals that have been living for millions of years. Their shells are made up of calcium carbonate and are well-preserved in sediments. The shells of these microorganisms are widely used in paleoceanography to determine past climatic conditions. Paleoceanography is the study of the history of the oceans in the geological past using sediments and fossils. It helps us to understand how the oceans and climate have changed over time.
Paleotemperature is the measure of the temperature that existed in past geological ages. The temperature is determined by various means, including studying the growth rings of trees, ice cores, and microfossils, and others. Microfossils are microscopic fossils that are found in rocks and sediments that help in reconstructing past environmental and climatic conditions.
Oxygen isotope ratio is the measure of the relative abundance of oxygen isotopes 18O and 16O in a sample. The ratio of the two isotopes changes as a result of temperature changes. The ratio is used to reconstruct past temperature changes.
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this answer i need pls ill mark brainliest
Answers
All - growth, exchange of gases, excretion, reproduction, and death (option d).
All living organisms undergo various life processes to maintain their existence. Let's analyze each option to determine which life processes are carried out by an organism's cells:
A. Only growth and exchange of gases: While cells are involved in growth and exchange of gases, they also participate in other life processes. This option is incomplete.
B. Only growth, exchange of gases, and reproduction: Cells play a crucial role in reproduction as they are responsible for the production of gametes and the process of cell division. However, there are additional life processes that cells also undertake.
C. Only growth, exchange of gases, excretion, and reproduction: This option includes excretion in addition to growth, exchange of gases, and reproduction. Cells participate in excretion by eliminating waste materials. However, there is one more life process that cells experience.
D. All - growth, exchange of gases, excretion, reproduction, and death: This option encompasses all the mentioned life processes. Cells are involved in growth as they undergo cell division and increase in number. They exchange gases through processes like respiration. Cells excrete waste products. They participate in reproduction through the formation of gametes and cell division. Lastly, cells also experience death as they have a limited lifespan.
Therefore, the correct answer is D. All - growth, exchange of gases, excretion, reproduction, and death.
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NEED HELP ASAP! Energy in a Carbohydrate
To create your model:
Look up and copy and paste or draw a model of a carbohydrate showing all of the elements and the bonds that hold the elements together.
Identify and color-code the different types of bonds in your molecular model
Label representative bonds with bond energies for the different types of bonds
Total CPE:
Using your model
Calculate the total chemical potential energy:
Create a Bar graph counting the number of each type of bond
Create a pie chart modeling the percent of chemical potential energy in each bond type
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SORRY FOR INFORMATION!!!
Answer:
Anything else
Explanation:
O don't know bro sorry for giving this information
Can someone pls help with questions 19-22 pls show steps
Answers
in well-lit environments with plenty of prey items, then such an observation would be consistent with which type of relationship
Answers
If an ecosystem is full of abundant food, well-lit environments, and other beneficial factors, the organisms can coexist in a commensalism relationship.
Commensalism is a relationship between two organisms where one organism benefits from the other without harming the other.The term commensalism refers to a type of relationship that benefits one organism while having no effect on the other organism. This relationship is beneficial to one organism while being neutral to the other. This is usually observed in environments with plenty of prey items because the organisms in the commensalism relationship can get all the necessary nutrients without causing any harm to the other.
Commensalism can be observed in different environments, such as aquatic, terrestrial, and even human societies. The relationship between the shark and the remora is a classic example of commensalism in aquatic environments. The remora feeds on the leftover food of the shark without causing any harm to the shark. Additionally, the shark gets cleaner skin as the remora eats the shark's dead skin cells. Hence, the commensalism relationship benefits both organisms without causing harm.
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In 2001, scientists found a fossilized skeleton from about 110 million years ago. The fossil resembled a modern crocodile in virtually every way, except for one: The fossil was 40 feet long, which is almost twice as long as the largest modern crocodile ever found. From this discovery, scientists concluded that
Answers
We can confirm that scientists used this discovery to conclude that crocodiles evolved to be smaller over time.
Why would small size help Crocodiles?Over time, many animals on the Earth evolved to smaller sizes. This made large predators unlikely to survive as they would need to hunt much more often than that of smaller predators in order to sustain themselves. This along with an increase in mobility explains some of the reasons why it was beneficial for crocodiles to evolve to be smaller over time.
Therefore, we can confirm that scientists used this discovery to conclude that crocodiles evolved to be smaller over time.
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is If you are confused about something in class, don't wait. Raise your hand and ask for help immediately. Do it while your teacher is still explaining the material. Your teacher will probably be happy that you are taking an active part in your education and should attempt to explain the material in a different way. If you are still confused, ask your teacher if he or she is available after class to give you additional instruction. You are worth it. Don't give up on yourself first person
Answers
If there is NO SELECTIVE SURVIVAL based on shell thickness within a population of snails, what happens to shell thickness in response to crab predation? The average shell thickness increases within each generation, but there is no change in shell thickness from generation to generation. There is evolution by natural selection of shell thickness, and average sheil thickness increases every generation. There may be evolution of shell thickness, but not through natural selection and not necessanly toward thicker shells. There is no change in shell thickness within the population.
Answers
If there is no selective survival based on shell thickness within a population of snails, there will be no change in shell thickness within the population.
In a population of snails, if there is no selective survival based on shell thickness, it means that the thickness of the shells does not provide any advantage or disadvantage in terms of survival and reproduction. In this scenario, there would be no driving force for natural selection to favor individuals with specific shell thicknesses.
Without selective pressure from crab predation, there would be no differential survival or reproductive success associated with shell thickness. As a result, the frequencies of different shell thicknesses would remain relatively stable from generation to generation.
While there may still be variation in shell thickness within the population due to genetic and environmental factors, there would be no consistent directional change in the average shell thickness over time. Any changes in shell thickness would be random or due to factors other than natural selection.
Therefore, if there is no selective survival based on shell thickness, the population of snails would exhibit no change in shell thickness over generations.
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Which type of cell is found in plants and animals? *
Amniotic
Eukaryotic
Ketonic
Prokaryotic
Answers
Answer:
Eukaryotic
Explanation:
This is the answer because:
Both plant and animal cells are eukaryotic cells, therefore, they contain membrane-bound organelles. For example, the nucleus, mitochondria, reticulum, golgi apparatus, and lysosomes.
Hope this helps!
Answer:
Eukaryotic
Explanation:
just did on flvs\
Which of the following statements about Cnidarians and Ctenophores are accurate? (Select all that apply) Ctenophores are filter feeders whereas cnidarians are carnivores Cnidarians have an incomplete digestive system whereas ctenophores have a complete digestive system Both cnidarians and ctenophores produce and utilize cnidocytes for prey capture Ctenophores swim using comb rows whereas cnidarians typically swim using muscle contractions A hydra or sea anemone displays the body form whereas a jellyfish displays the body form. polyp/ medusa Omedusa/ polyp O polyp/ polyp medusa/ medusa What are the cnidocytes? specialized flagellated cells for water movement through the cnidarian body specialized ciliated cells that help the animal swim specialized adhesive cells used in feeding specialized cells with threadlike filaments that function in prey capture and defense specialized excretory cells for waste removal
Answers
The correct statements are:Ctenophores are filter feeders whereas cnidarians are carnivores.Cnidarians and Ctenophores are two phyla of animals in the Kingdom Animalia that exhibit significant diversity in form and lifestyle.
Cnidarians and Ctenophores both produce and use cnidocytes for prey capture. Cnidocytes are specialized cells with thread-like filaments that function in prey capture and defense.Both cnidarians and ctenophores exhibit two distinct body forms: a polyp and a medusa. A hydra or sea anemone displays the body form whereas a jellyfish displays the medusa body form.
Ctenophores swim using comb rows whereas cnidarians typically swim using muscle contractions.Cnidarians have an incomplete digestive system, whereas ctenophores have a complete digestive system.
The correct statements are:Ctenophores are filter feeders whereas cnidarians are carnivores.Cnidarians have an incomplete digestive system whereas ctenophores have a complete digestive system.Both cnidarians and ctenophores produce and utilize cnidocytes for prey capture.
Ctenophores swim using comb rows whereas cnidarians typically swim using muscle contractions.A hydra or sea anemone displays the polyp body form whereas a jellyfish displays the medusa body form.The correct answer is option A, C, D, and E.
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Does natural selection give organisms what they need
Answers
Answer:
La formulación clásica de selección natural establece que las condiciones de un medio ambiente favorecen o dificultan, es decir, seleccionan la reproducción de los organismos vivos según sean sus peculiaridades. La selección natural fue propuesta por Darwin como medio para explicar la evolución biológica.
Explanation:
How does the movement of energy and matter through the food chain cause the average mass of the whale to change? Please help me out.
Answers
Answer:
The ten-percent rule toward energy transfer among levels of a trophic system is one that has been used to study ecosystems’ energy dynamics for a long time.
Explanation:
Food chains describe the transfer of energy from its source in plants, through herbivores, up to carnivores and onto higher order predators (Sinclair et al. 2003). These different “levels” are known as trophic levels, which is properly defined as the position within the food chain or energy pyramid that an organism can be found. But how much energy is passed along through each level? This is where the ten-percent rule comes in.
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Before you perform an experiment, which variable should you already know? A. A distant variable B. A manipulated variable C. A responding variable D. An experimental variable
Answers
Answer:
B.
Explanation:
A dam is built that separates a river into two sections—a deep upstream section and a shallow downstream section. When the dam is first built, a fish species is able to move from the upstream section into the downstream section, but not vice versa. Predators can more easily catch the fish in the shallow downstream section than they can in the deep upstream section. Which scenario is most likely to lead to speciation?
A. The fish population contains individuals with effective predation evasive traits and eventual changes to the dam prevent fish from moving downstream.
B. The fish completely lack any effective predation evasive traits across the entire population, move infrequently from upstream to downstream locations, and reproduce with low frequency.
C. The fish reproduce with high frequency, move with high frequency from upstream to downstream locations, and have a robust set of predation evasive traits across the entire population.
D. The rate of upstream fish entering the downstream section decreases over time without being completely shut off, and many of these fish carry predation evasive traits.
Answers
Scenario A is most likely to lead to Speciation
Speciation is the development of an entirely new species from a given population over the course of evolution.
A group within a species undergoes speciation when it diverges from other individuals in the species and acquires its own distinct traits. The new species will be distinct from its ancestors due to environmental requirements or individual traits of the members of the new group.
Speciation requires:
.Geographical barrier.
.Natural selection.
.Genetic drift.
.Large mutation.
Here scenario is the only case where all conditions are met as eventual changes to the same provide a Geographical barrier.
Certain individuals have predator evasive traits which favor natural selection
The movement of fishes from Upstream stream to Down the stream is genetic drift.
So in the situation A the speciation will most likely to occur because of the invasive of the predators.
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During mitosis in animal cells, at which phase do centrioles begin to move apart? anaphase prophase prometaphase telophase metaphase
Answers
During mitosis in animal cells, the phase do centrioles begin to move apart is prophase stage.
Prophase marks the start of mitosis and is preceded by interphase. During the prophase stage, the centrosomes divide and move away from one another, and microtubules begin to develop from the centrosomes, forming the spindle apparatus. The prophase stage of mitosis is characterised by the disintegration of the nuclear envelope, which is a double membrane that surrounds the nucleus. In addition, the chromatin threads begin to condense into discrete chromosomes during the prophase stage.
In animal cells, the centrioles are the tiny, self-replicating organelles that aid in cell division by aiding in the formation of the mitotic spindle apparatus. The mitotic spindle is critical for the segregation of chromosomes in the dividing cells. It is therefore established that the centrioles begin to move apart during the prophase stage in animal cells during mitosis. So therefore centrioles begin to move apart during the prophase stage in animal cells during mitosis.
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Which of the following statements about natural selection is true:
• Individual organisms change over time
•Populations of organisms change over time
•Organisms do not change over time
Answers
Answer:
Option 2 (Population of organisms change over time.