When would scientist be most likely to use the type of model shown in the illustration?

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

The combining form leuk/o means red true or false

Across of blue x blue (both heterozygous) would result in