How does the washing of hands prevent a societal problem?

a .it keeps water supplies clean.

b. it treat inherited disease.

c. it protect the environment.

d. it reduces the spread of disease.

Astudent is looking through a microscope at some cells of an onion root tip. many of these cells are undergoing division since the root tip grows quickly and requires more cells. which cell most recently underwent metaphase? w x y z