Schistosomiasis has increased in areas where
A. snails have become a delicacy.
B. crayfish are eaten.
C. dams have been built.
D. swamps have been drained.
C
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Growth and development of plant parts involves _____. I) cell division to produce new cells II) enlargement and elongation of cells III) specialization of cells into tissues
A) only I B) only II C) only III D) I and III E) I, II, and III
Almost all of the antibodies found in a newborn are
A. the result of infection. B. self-made. C. IgM. D. the result of passive immunity.
Chromosomes align along the equator during
A. metaphase. B. anaphase. C. telophase. D. prophase.
Why does a DNA strand grow only in the 5? to 3? direction?
A) because DNA polymerases can only add nucleotides to the 3? end of the growing molecule B) because DNA polymerases can only add nucleotides to the 5? end of the growing molecule C) because the DNA molecule only unwinds in the 5? to 3? direction D) because DNA polymerase requires the addition of a starter nucleotide at the 5? end