In most animals, what is the third germ layer that forms within the remaining blastocoel?

After fertilization, the egg undergoes rapid cell divisions called ________________

The most common distribution pattern in nature is clumped

A biome is identified by its

The competitive exclusion principle states that 

Differentiation (or specialization) in the cells of a developing embryo occurs when:

Organisms that hunt together and/or help defend each other from predators will probably show a _ distribution pattern.

A population of fur seals increased rapidly for almost 20 years and then began to level off as the population reached the carrying capacity.  When this population is graphed, it will produce a __.

Which of the following experiments is studying the effect of an abiotic factor? 

Which of the following is NOT shown on (or able to be predicted from) an age structure graph?