In about 9 months, a human develops from a fertilized egg into a fully formed human. During which phase of pregnancy do the lungs complete development?
A) second trimester
B) third trimester
C) after birth
D) first trimester
Ans: B) third trimester
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Which of the following is a location for a cell cycle check point?
a. between G1 and S b. between S and G2 c. between G2 and anaphase d. between prophase and anaphase
____ are responsible for cell mediated immunity
a. Natural killer cells b. Monocytes c. T lymphocytes
d. B cells e. Macrophages
Two populations that have been separated by a river are most likely to become separate species if
A) fur color is different in the two populations. B) genes controlling ear development become different so that members of one population have much longer ears than the other. C) genes controlling molecules on the surface of the sperm that bind with egg receptors are different in the two populations. D) feeding habits are different in the two populations.
Like the kidney, a dialysis machine leaves what in the blood?
What will be an ideal response?