Which statement describes how favorable traits in a population relate to natural selection?
They are the only traits that ever exist in the population.
They build in the population over time.
They are rarely passed on to offspring.
They are found only in a few individuals within the population.
The statement "They build in the population over time" describes how favorable traits in a population relate to natural selection.
is the total disappearance of all members of a species.
The total disappearance of all members of a species is referred to as extinction.
A genetic mutation causes a squirrel to be born with much darker fur than its parents.
How will this mutation most likely affect the squirrel population?
Because the trait was caused by a mutation, it will not be passed on to any offspring, resulting in the disappearance of the trait.
Because the trait was caused by a mutation, it will be passed on to offspring over many generations, resulting in a population of darker squirrels.
If the trait is unfavorable, it will be passed on to offspring over many generations, resulting in a population of darker squirrels.
If the trait is favorable, it will be passed on to offspring over many generations, resulting in a population of darker squirrels.
If the darker fur trait caused by the genetic mutation is favorable, it will most likely be passed on to offspring over many generations, resulting in a population of darker squirrels.
Organisms must have variation within a population in order for natural selection to occur.
Which situation is an example of this variation?
A frog living in a pond is eaten by a predator, while others in the same population survive.
A snake living in a desert produces more offspring than other snakes in the same population.
Some rabbits living in a forest have short, spotted ears, while others have long white ears.
Some birds living in a grassland eat less than other birds who eat the same food.
The situation that demonstrates variation within a population is: Some rabbits living in a forest have short, spotted ears, while others have long white ears.
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Complete the sentences to describe natural selection.
The environment needs to
in order for natural selection to occur.
Populations have some genetic
.
Nature selects organisms with specific
to survive and reproduce.