What product of the light-dependent reactions is released directly into the environment?
a. O2
b. electrons
c. NADPH
d. ATP
e. hydrogen ions
ANSWER: a
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According to genetic evidence, the migration of H. sapiens out of Africa replaced other human populations, including Neanderthals and H. erectus, leading to their extinction
a. True b. False Indicate whether the statement is true or false
The inferior vena cava moves blood from the ____
a. head only b. forelimbs only c. head and forelimbs d. abdominal organs only e. abdominal organs and hind limbs
How does the protozoan Trypanosoma evade detection by the immune system?
A) It produces a capsule which is composed of polysaccharides similar to those found in the host. B) It can change the surface antigens frequently, preventing the immune system from tracking it. C) It prevents phagosome-lysosome fusion. D) It can resist oxidation inside macrophages.
Variation among organisms is due to mutations
Indicate whether the statement is true or false