A CD4 count that is below which amount classifies an infected person as having AIDS? A 200 cells per mm3
B 800 cells per mm3
C 400 cells per mm3
D 600 cells per mm3

Aeukaryotic cell must be from a plant if the cell a) a nucleus b) a nuclear envelope c) cytoplasm d) a cell wall

Where would you expect to see seedless plants, such as ferns and mosses? a. in a botanical museum, because they are all extinct b. low and close to the ground in a moist environment c. climbing high while circling the branches of another plant d. deeply rooted in a forest with a trunk that reaches 20 meters or more

Modern whales developed their traits through natural selection what occurs during the process of natural selection