The intricate structure of a DNA molecule involves two strands of DNA running parallel to one another in the same direction
A) True
B) False
B) False
Feedback: The two DNA strands run in opposite directions, antiparallel
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If modern humans came from Africa, what explains the loss of pigmentation seen in different races?
A. Since there was less sunlight, darker pigmentation wasn't needed. B. The lighter-pigmented humans are found in colder climates, where having less pigmentation preserves heat. C. The diet found in the areas where lighterpigmented humans are found contain compounds that interfere with the production of pigmentation. D. Lighter pigment allows for more efficient production of vitamin D, an advantage in areas with less sunlight. E. None of the answer options is correct.
A goose that was hatched by a swan grows up to unsuccessfully court swans. This is an example of
A. anthropomorphism. B. classical conditioning. C. imprinting. D. insight learning.
You find a new organism. It gains nutrients by secreting enzymes outside of itself and absorbing the digested product. It is eukaryotic and has a cell wall containing chitin. It reproduces with flagellated, swimming spores
You classify the new organism as a(n) A) basidiomycota. B) ascomycota. C) mushroom. D) rumen fungus.
During meiosis II, _____.
A) the sister chromatids separate from one another B) homologous chromosomes separate from one another C) each duplicated chromosome lines up with its partner D) crossing over occurs E) all of the choices are events seen in meiosis II