What comes first in the process of cell division? A. Chromatids line up in the center of the cell
B. Chromatids are pulled apart
C. Chromatids are duplicated
D. Cell splits in two

What are the two causes of density in deep current waters? a. salinity (how much salt) of the water and high temperaturesb. salinity (how much salt) of the water and low temperatures c. oxygen content of the water and high temperatures. d. oxygen content of the water and low temperatures

Some substances but not other can cross the (blank) membrane of a cell

Choose the diagram that best represents a habitat corridor explain your choice.