Asingle cell undergoes mitosis every five minutes. how many cells will result from this cell in 20 minutes?
a. 4
c. 16
b. 8
d. 20

Which of the following is not a symptom of desertification? a) decrease in salt content of the soil b) lowering of the water table c) reduced surface water d) increased soil erosion e) loss of native vegetation

Witch theory suggests all living things are made up of cell or cells

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above