DNA or protein can be used as a molecular clock that tells how long it has been since two species have diverged from a common ancestor

What is a symbiotic relationship? And how does it work?

Consider a population of snowshoe hares in Montana. Their fur color changes in response to changes in day length. During the long summer days, they have brown fur, but as the days shorten in the fall, their fur turns white in preparation for winter.

Which two reasons do marine animals make sounds underwater? a. to seek out mates b to imitate humans c. to ward off predators d. to create music e. to attract prey

An organism that uses energy to produce it's own food supply from inorganic compounds is called:

Science is the systematic study of 1 life 2 nature 3 earth 4 beliefs

Give two abiotic factors which will affect the growth on a school playing field

What are the big four macromolecules common to living organisms, what are the subunits of each?

Match each process to the sphere at most directly involves

What are the four basic needs all living things must satisfy

What property makes water molecules stick together?