Which of the following plants contains nitrogen-fixing bacteria in its root nodules?
A) Potatoes B) Corn C) Oranges D) Tomatoes E) Soybeans
E
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A marine biologist visits your biology class and begins his talk entitled, "Life as a Trochophore." A friend seated next to you asks, "What is a trochophore?" You explain that a trochophore is
A. another name for the veliger stage in earthworm reproduction. B. a term used to describe a larval form of either the phylum Mollusca or Annelida. C. another name for the veliger stage in the oyster. D. similar to a lophophore, but only found in the phylum Annelida. E. a parasite in the intestines of a bivalve mollusk.
Hydrothermal vents allow organisms to live in ____
a. the open ocean b. the intertidal zone
c. the deep sea d. the kelp forest e. coral reefs
If each nucleotide coded for a single amino acid, how many different types of amino acids could be combined to form proteins?
a. 4 b. 16 c. 20 d. 64 e. none of these
Why might predators take more time to recover following a disturbance than herbivores or producers?
a. Recovery time is based on the flow of energy, so herbivores recover first, then producers, and then predators b. Recovery time is based on the flow of energy, so producers recover first, then herbivores and finally predators. c. Recovery time is based on solar cycles, and thus predators are the second group to recover. d. Predators actually recover more quickly than others because of their mobility.