Different species are primarily distinguished by their DNA. While size, diet, and physical appearance can also vary between species, genetic differences are the most definitive criteria for distinguishing one species from another.
Different species are distinguished by their(1 point)
Responses
size
size
DNA
DNA
diet
diet
physical appearance
11 answers
How are transitional fossils evidence to support the process of natural selection?(1 point)
Responses
They show intermediate steps in the evolution process.
They show intermediate steps in the evolution process.
They show that every species of animals developed separately.
They show that every species of animals developed separately.
They show plants and animals that once existed but do not exist now.
They show plants and animals that once existed but do not exist now.
They show that most species have not changed over long periods of time.
They show that most species have not changed over long periods of time.
Responses
They show intermediate steps in the evolution process.
They show intermediate steps in the evolution process.
They show that every species of animals developed separately.
They show that every species of animals developed separately.
They show plants and animals that once existed but do not exist now.
They show plants and animals that once existed but do not exist now.
They show that most species have not changed over long periods of time.
They show that most species have not changed over long periods of time.
Transitional fossils provide evidence to support the process of natural selection because they show intermediate steps in the evolution process. These fossils illustrate how different species have evolved over time, showcasing gradual changes that link ancestral forms to descendant groups.
When Charles Darwin discovered the various finch species on the Galápagos islands, he was surprised to find so many different but related species in such a small geographic area. Which of the following best illustrates the correlation between competitive advantage and an individual’s traits in a particular environment?(1 point)
Responses
Different islands had very different food resources available, and only individuals that were adapted to eat those food resources survived and reproduced on that island.
Different islands had very different food resources available, and only individuals that were adapted to eat those food resources survived and reproduced on that island.
Mating behaviors in finch species ensure that different species of finch will not interbreed with one another.
Mating behaviors in finch species ensure that different species of finch will not interbreed with one another.
Competition between different species for food resources led to resource partitioning of the ecosystem.
Competition between different species for food resources led to resource partitioning of the ecosystem.
Finches had no natural predators on the island before Darwin’s voyage, allowing them to prosper on the islands.
Responses
Different islands had very different food resources available, and only individuals that were adapted to eat those food resources survived and reproduced on that island.
Different islands had very different food resources available, and only individuals that were adapted to eat those food resources survived and reproduced on that island.
Mating behaviors in finch species ensure that different species of finch will not interbreed with one another.
Mating behaviors in finch species ensure that different species of finch will not interbreed with one another.
Competition between different species for food resources led to resource partitioning of the ecosystem.
Competition between different species for food resources led to resource partitioning of the ecosystem.
Finches had no natural predators on the island before Darwin’s voyage, allowing them to prosper on the islands.
The statement that best illustrates the correlation between competitive advantage and an individual’s traits in a particular environment is: Different islands had very different food resources available, and only individuals that were adapted to eat those food resources survived and reproduced on that island. This highlights how specific traits provide a competitive advantage in response to the available resources in a particular environment, leading to the survival and reproduction of those individuals.
How does an individual with a competitive advantage lead to the evolution of an entire species?(1 point)
Responses
Individuals that survive due to their competitive advantage are able to expand their range, similar to how the finches radiated out from one common ancestor on the mainland.
Individuals that survive due to their competitive advantage are able to expand their range, similar to how the finches radiated out from one common ancestor on the mainland.
Those who have traits that help them survive are able to reproduce, and their offspring have those traits, leading to a change in the species over time.
Those who have traits that help them survive are able to reproduce, and their offspring have those traits, leading to a change in the species over time.
Traits that are advantageous help certain individuals reproduce at higher rates, so those traits are more common within the population.
Traits that are advantageous help certain individuals reproduce at higher rates, so those traits are more common within the population.
Some individuals are better at competing for resources, and that allows them to survive droughts or other major ecological events, leading to the extinction of certain species and the survival of others.
Responses
Individuals that survive due to their competitive advantage are able to expand their range, similar to how the finches radiated out from one common ancestor on the mainland.
Individuals that survive due to their competitive advantage are able to expand their range, similar to how the finches radiated out from one common ancestor on the mainland.
Those who have traits that help them survive are able to reproduce, and their offspring have those traits, leading to a change in the species over time.
Those who have traits that help them survive are able to reproduce, and their offspring have those traits, leading to a change in the species over time.
Traits that are advantageous help certain individuals reproduce at higher rates, so those traits are more common within the population.
Traits that are advantageous help certain individuals reproduce at higher rates, so those traits are more common within the population.
Some individuals are better at competing for resources, and that allows them to survive droughts or other major ecological events, leading to the extinction of certain species and the survival of others.
The response that best explains how an individual with a competitive advantage leads to the evolution of an entire species is: Those who have traits that help them survive are able to reproduce, and their offspring have those traits, leading to a change in the species over time. This encapsulates the fundamental concept of natural selection, where advantageous traits increase reproductive success, allowing those traits to become more common in the population, ultimately resulting in evolution.
Sudden blinking when something comes near your eyes is an example of(1 point)
Responses
reflexive action.
reflexive action.
negative taxis.
negative taxis.
positive taxis.
positive taxis.
kinesis.
kinesis.
Responses
reflexive action.
reflexive action.
negative taxis.
negative taxis.
positive taxis.
positive taxis.
kinesis.
kinesis.
Sudden blinking when something comes near your eyes is an example of reflexive action. This is an involuntary and rapid response to a stimulus, in this case, the approach of an object towards the eyes.
How is antigenic drift beneficial for viruses?(1 point)
Responses
It changes how genes code for antigens.
It changes how genes code for antigens.
It leads to less mRNA which is easier to copy.
It leads to less mRNA which is easier to copy.
It creates a variety of immune responses in the host organisms.
It creates a variety of immune responses in the host organisms.
It makes them unrecognizable to the immune system.
Responses
It changes how genes code for antigens.
It changes how genes code for antigens.
It leads to less mRNA which is easier to copy.
It leads to less mRNA which is easier to copy.
It creates a variety of immune responses in the host organisms.
It creates a variety of immune responses in the host organisms.
It makes them unrecognizable to the immune system.
Antigenic drift is beneficial for viruses because it makes them unrecognizable to the immune system. This genetic variation allows viruses to evade the host's immune response, enabling them to infect the host more effectively and persist in the population.
1 answer