In which of the following examples is homeostasis being maintained through passive transport? Materials enter the cell in bulk through endocytosis.
Oxygen dissolves in the lipid bilayer and enters the cell.
Proton pumps move hydrogen ions out of the cell.
Vesicles fuse with the cell membrane during exocytosis.

What are tissues? a groups of tissues that work together b basic units of structure and function c groups of cells that perform the same function d multiple organs that perform a major function

Which of these is not a nucleotide base found in dna?

Which statement best explains why cells were observed in more detail using a compound microscope than a simple microscope? a compound microscope has greater magnification ability than a simple microscope. the compound microscope was invented before the simple microscope. a compound microscope is much easier to manufacture than a simple microscope. compound microscopes were more common than simple microscopes.