interact with the antigen-class ii mhc complex presented by macrophages.

Advances in technology have enabled scientists and researchers to better study the evolutionary relationships between species

The finches on the galapagos island were similar in form except for variations of their beaks. darwin observed that these variations were useful for: attracting a mate defending territory building nests gathering food

Anne, an intern in a microbiology lab, was observing the characteristics of various specimens of protists. match each specimen to the category of protist to which it belongs.