Why do polar bodies form?
A. They nurse the egg as it leaves the follicle.
B. This is extra chromosomal material representing the X chromosome in each female cell.
C. They orient the sperm toward the egg.
D. They allow a reduction in chromosomes while preserving all the food for one egg.
E. They orient the egg for penetration by the sperm.
Ans: D. They allow a reduction in chromosomes while preserving all the food for one egg.
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In a phototropism, auxin moves to the ___ side
of the stem and causes cell ___.
a. shade--elongation b. sun--elongation c. sun--division d. shade--division e. shade--apotosis
Which organ lies in the pelvic cavity?
a. stomach b. bladder c. liver d. large intestine e. heart
Within the phylum Cnidaria, corals are most closely related to:
A. Hydra. B. jellyfish. C. sea anemones. D. Portuguese man-of-war. E. hydrozoans.
The lineage that first separated from the common ancestor of all animals, and retains many of the same primitive features to this day, includes which of the following modern organisms?
a. The grasshopper b. The sea turtle c. The jellyfish d. The sponge e. The earthworm