A certain species has offspring that require a very large amount of parental care. Predict their mating system.
A. monogamous
B. polyandrous
C. polygynous
D. monotonous
A. monogamous
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Soils of tropical rain forests are poor in carbon
mostly because of a. the rapid decomposition and uptake of organic matter. b. leaching. c. the high humidity. d. the high temperature. e. the rapid rate of photosynthesis.
Suppose that plasma membranes were single layers of phospholipids rather than double layers, and the heads faced the extracellular fluid. The interior of this hypothetical cell would have to be
A) nonpolar only. B) hydrophilic only. C) polar only. D) hydrophobic only. E) hydrophobic and nonpolar.
The subatomic particle(s) with a negative charge
is(are) a. the neutron. b. the proton. c. the electron. d. both the neutron and proton. e. both the proton and electron.
You are growing Bacillus subtilis, an aerobic bacterium that can also carry out fermentation when required, in a bioreactor and notice that the growth rate has slowed and the pH has decreased. What could you add?
A) glucose B) lactose C) peptides D) oxygen E) lactic acid