How do whales, bats, and dolphins use echolocation.
a. to scare away predators
b. to orient themselves and to find food
c. to attract mates
d. to tell other animals of their species where they are

Which best describes the structure of dna?

How do antiviral drugs work? in your own words.

Migration is a. the movement of organisms from a native location to a foreign location b. the movement of organisms from a foreign location to a native location the movement of organisms from their water supply to their food supply d. the seasonal movement of organisms between locations c. select the best answer from above