D. Erasmus Darwin - competition and sexual selection as an impetus for change
Category C animals are not
subjected to procedures that involve pain or distress or would be required to
use pain-relieving drugs. Routine procedures such as injections and blood
sampling from veins that produce only mild, transient pain or discomfort are
reported in this category.
The worms and amphipods eat decaying matter (detritus) and they also eat the seafloor plants. 4B. ... Hint: Worms and amphipods cause rot on the plants that they eat.
