Ddt, dde, pcbs, and pbdes are all ________.

Industrial ecologists ________.

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 _____.

As the glomerular filtrate is formed, it flows from the bowman's capsule into the __________.

Arthropod exoskeletons and mollusc shells both ________.

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 ________.