Amphibian eggs are
a. tough and leathery
b. soft and jelly-like
c. hard and breakable
d. bumpy and crusty

Specialized cells which perform a particular function form : organisms organs tissues

How energy flows through each level in this energy pyramid. is all the matter and energy from one level transferred to the next level?

Which statement describes how favorable traits in a population relate to natural selection? they are the only traits that ever exist in the population. they build in the population over time. they are rarely passed on to offspring. they are found only in a few individuals within the population.