The evolution of eukaryotic cells most likely involved _____.

Uniform spacing patterns in plants such as the creosote bush are most often associated with _____.

Unikonta is a supergroup that includes all of the following except _____.

What was an early selective advantage of a coelom in animals? a coelom _____.

The most important feature that permits a gene to act as a molecular clock is _____.

The most active form of ____________ is called calcitriol.

Archaea that "eat" methane are considered to be _____.

Archaea and eubacteria are primarily different in _____.

Animals such as earthworms and millipedes which feed on dead organic matter are ________.

Animals meet their energy needs by combining glucose with _____.

Analogous structures _____.