Immune surveillance is a process in which nonspecifically detect and destroy foreign cells and diseased host cells. t lymphocytes (t cells) reticular cells dendritic cells macrophages natural killer (nk) cells

Ryan rears sheep for their wool. recently the quantity of wool that ryan gets has diminished. this is because the new sheep are not that wooly. ryan should add which nutrient to their feed so that the sheep becomes more wooly? a.cornb.ironc.cottonseedd. vitamin a

What is the difference between a scientific hypotheses and a scientific theory?

What is it called when part of a cell membrane closes around a molecule to allow the molecule to enter the cell? a. passive transport b.diffusion c. endocytosis d. exocytosisc. endocytosis