Darwin spent five years doing research while sailing on the ____
a. H.M S. Pinafore
b. H.M S. Beagle
c. H.M S. Constitution
d. H.M S. Independence
e. H.M S. Weatherford
ANSWER: b
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Most fungi require __________ and are therefore __________
a. carbon dioxide; aerobic b. carbon dioxide; anaerobic c. oxygen; aerobic d. oxygen; anaerobic
As oxygen binds to hemoglobin, the ________ of the hemoglobin molecule will change through a process of ________ such that the binding of oxygen is enhanced.
A) amino acid sequence : phosphorylation B) cooperativity : negativity C) affinity : positive cooperativity D) affinity : negative cooperativity E) cooperativity : positivity
Why do plants containing nitrogen-fixing bacteria in their roots need less nitrogen-based fertilizer than others?
A) The plants break down the bacteria as a source of nitrogen-rich nutrients. B) The bacteria convert nitrogen in the air into a form that can be taken up by the plants. C) The plants and bacteria work together to attract birds, which deposit nitrogen-rich droppings near the plant. D) The bacteria kill and digest earthworms and other animals in the soil, providing excess nitrogen to the plants.
Polygyny is often positively correlated with:
a) territoriality and mate guarding. b) equal parental investment and equal choosiness in mate selection. c) sexual monomorphism and variation in male reproductive success. d) sexual dimorphism and variation in male reproductive success. e) sexual dimorphism and variation in female reproductive success.