Which of the following Hardy-Weinberg principle is least characteristic of the human population?
a. Mutations never occur.
b. The population is infinitely large.
c. The population is isolated from all other populations of the species.
d. Mating is generally random (no set of traits are consistently selected for/against in mating.)
e. Natural selection does not occur.
What will be an ideal response?
Answer: a
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When we compare levels of genetic variation in a contemporary African population to that of a contemporary non-African population, we find there is:
A. more variation in the African population. B. more variation in the non-African population. C. equal variation in both populations. D. no consistent pattern: sometimes we find more variation in the African population and sometimes we find more in the non-African population. E. None of the answer options are correct.
If plants did not produce vascular tissue they would be limited to a few millimeters in height
A. true B. false
In which terrestrial biome is biodiversity the greatest?
a. Temperate forests b. Boreal forests c. Tropical rainforests d. Subtropical deserts
Which of the following is not true of the antigen-independent period of lymphocyte development?
A. Lymphocytes with specificity for self are destroyed. B. Mature lymphocytes populate lymphatic organs and encounter antigens. C. Many lymphocytes with different specificities are formed. D. Random genetic rearrangements occur to produce different surface protein receptors. E. Lymphocytes form from stem cells in the bone marrow.