Molecules and ions reabsorbed from the nephron reenter the blood at the
a. efferent arteriole.
b. peritubular capillaries.
c. renal artery.
d. afferent arteriole.
e. glomerulus.
B
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Which of the following is an example of a triploblast?
a. A sea anemone b. A goat c. A sponge d. A sea star
Auxin concentration gradients
a. appear once germination begins. b. cause regional differences in gene transcription. c. allow formation of plant parts in expected patterns. d. help young cells elongate so that shoots and roots lengthen. e. are described by all EXCEPT “appear once germination begins.”
What is the initial carbon-containing starting product in the Calvin cycle?
A) glyceraldehyde 3-phosphate B) glucose C) ribulose bisphosphate D) rubisco
A persistent infection is one in which
A) the virus remains in equilibrium with the host without causing a disease. B) viral replication is unusually slow. C) the disease process occurs gradually over a long period. D) host cells are gradually lysed. E) host cells are transformed.