What type of natural selection is this: When a group of deer migrated to a cold mountain, the thin-furred deer and average-furred deer died. The thick-furred deer survived and eventually the population became thicker-furred.

As an environment changes, some organisms have a higher fitness than others in the new environment. This can lead to __________. Choose the correct answer.

Match the following

In a wild leopard population, cubs that are born with low birth weights lose heat more quickly and tend to die, while babies that are too large are not able to deliver through the pelvic bones of the mother leopard. This leads to a high mortality rate for cubs that are born too small or too large. Which changes in the population would you expect to see?

Which processes would MOST LIKELY lead to a variation in the tail lengths of mice? (Select TWO that apply)

Many different groups of organisms have wings, even though they do not share a recent common ancestor. This is because they evolved in environments with similar selective pressures. Wings are an example of a(n) ______________ structure.

What type of evidence is represented in the picture above:

A type of structure that is physically present, but does not seem to serve a significant function for an organism.

Individuals undergo evolution.

Which statement is true about this diagram?

Which term is used to describe when a generation has more offspring than can be supported by the environment?

Which two living organisms are most closely related?

Physical differences between males and females of the same species, like the bright feathers on the male peacocks or the large mane on male lions, is called ____________________________.