Which plant structure found in lower plants produces gametes? gonad gametangium sperm ovum

Which of these is not a function of some membrane proteins ? a.allowing polar molecules to enter the cell b.recognizing other types of cells c.receiving messeges from other cells b.carrying messages to oher cells

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

The cretaceous period spanned the time interval between and 65 million years ago. 250 million 144 million 75 million 200 million