Which of the following best states the purpose of villi? which of the following best states the purpose of villi?
a. speed up the elimination of wastes
b. increase surface area for purposes of absorption
c. increase the synthesis of enzymes
d. speed up the loss of water from the body

Some species of hummingbirds have different shapes of beaks that evolved to allow them to drink from certain flowers. the flower species have evolved to produce nectar that is tasty for the hummingbirds. this example is a type of . cuckoos lay eggs in the nests of other birds. the cuckoo lays eggs identical to the eggs of the host species, so the other bird takes care of it. this is an example of .