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

What is the importantence of the carbon and nitretan cycles in the environment

Rachel ate a piece of fruit and happened to drop the seeds in her backyard. after a few weeks, she saw a small plant with flowers growing in the backyard. which group does this plant belong to? a. angiosperms b. gymnosperms c. pteridophytes d. bryophytes e. chytrids

What is usually (but not always) related to the metabolic processes of living organisms in its organic form?