What is the male sexual structure that produces sperm in plants?
a. antheridium
b. archegonium
c. sporangium
d. strobilus
e. stoma
a
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When the size of a cell increases, the surface area/volume ratio
A) decreases initially and then begins to increase. B) remains the same. C) decreases. D) increases initially and then begins to decrease. E) increases.
Phage T4 protects its DNA from cleavage by host restriction enzymes by
A. inactivating restriction enzymes. B. replicating very rapidly. C. substituting glucosylated hydroxymethylcytosine for cytosine. D. methylating bases.
Estrogen is involved in calcium metabolism as well as female reproductive functions. This is why post-menopause, women experience which of the following conditions as a result of decreased estrogen?
a. gall stones b. dementia c. osteoporosis d. arthritis
A temperate virus is one that will first:
A. Avoid the lysogenic cycle B. Enter the lytic cycle C. Lie dormant or cause a latent infection as it enters the lysogenic cycle D. Cause apoptosis E. Immediately lyse the cell upon entry and replication