Which era contains the jurassic period? a. cenozoic period b. mesozoic c. paleozoic d. precambrian

How is the carbon cycle related to global warming ?

What condition is kept close to its set point in osmoregulation? a. body temperature b.platelet count c.blood glucose level d.water balance

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