Chloroplasts are thought to have originated as
endosymbiotic associations when aerobic bacteria
engulfed photosynthetic cells. This relationship was
favored by the production of ___________ by the
endosymbiont.
a. glucose
b. hydrogen ions
c. ATP
d. oxygen
e. water
Answer: d
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Replication of DNA is
A. conservative. B. redundant. C. dispersive. D. semiconservative. E. semidispersive.
Considering solutions on either side of a selectively permeable membrane, a solution of higher osmolarity is said to be
hyperosmotic to a solution of lower osmolarity
Indicate whether the statement is true or false.Vascular plants and air-breathing animals first appeared during the:a
Silurian period. b. Ordovician period. c. Cambrian period. d. Permian period. e. Cretaceous period.
Several hours after a meal, glucagon increases blood glucose levels by activating an enzyme that breaks down glycogen, which is stored primarily in the
A) liver. B) pancreas. C) small intestine. D) kidneys. E) heart.