Acomplex of interconnected food chains in an ecosystem is called a/an
a. trophic stack.
b. food web.
c. ecosystem.
d. ecological pyramid.

The cluster of developing cells from conception until birth is called an

Rarefaction is used for which of the following? a. creating a representative sample b. studying how disease impacts populations c. rediscovering species thought to be instinct d. determining which sea creatures live in an area

What is a photon? a. part of a ribosome b. a light particle c. a carbon dioxide molecule d. part of a chloroplast b.a light particle