Cladistic analysis of populations of blue wildebeest in Africa has helped to show that habitat fragmentation has led to
a loss of ____.
a. evolution
b. alleles
c. genes
d. gene flow
e. mutations
ANSWER: d
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Which structures contain valves?
a. arteries and veins b. arteries and heart c. arteries, capillaries, and heart d. lymph capillaries, arteries, and heart e. lymph capillaries, veins, and heart
Angiosperms mystified Darwin because they seem to have appeared suddenly in the fossil record
Indicate whether the statement is true or false.
Leaf __________ in the fall is an adaptation for flowering plants to survive harsh winters in temperate
climates. a. desiccation b. photosynthesis c. abscission d. growth e. production
The Calvin cycle operates during which part of photosynthesis?
a) Only the light reaction b) Only the dark reaction c) Both light and dark reactions d) Only photosystem I