The fossil records indicates that ________ lived in families of male-female pairs, used fire, and left evidence of social cooperation (lived communally).
A) Homo habilis
B) Australopithecus
C) Dryopithecus
D) Homo erectus
D) Homo erectus
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Gene flow through migration ________
A) has no effect on allele frequencies of populations B) can go only in one direction C) may have the largest impact on small populations, such as those on islands D) maintains the Hardy-Weinberg equilibrium
In a tide pool, invertebrate species richness was 15. A researcher experimentally removed one species and over time the species count decreased to eight. The species removed was likely a(n)
A) mutualist. B) herbivore. C) detritivore. D) keystone species. E) C or D
The immunoglobulin class that is the only one capable of crossing the placenta is
A. IgA. B. IgE. C. IgM. D. IgG. E. IgD.
Ferro plasma acidiphilum:
a. Iron Mountain, CA b. obsidian pools in Yellowstone National Park c. sewage sludge and bovine rumens d. associates with Ignicoccus e. deep sea vents