Which of the following tend to increase genetic variation in a population?
A. Gene flow.
B. Population bottleneck.
C. Nonrandom mating, resulting in inbreeding.
D. Mutations, resulting in neutral variation.
E. Founder effect, resulting in the decrease in allele frequency and results in inbreeding.
A. Gene flow.
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True-breeding, purple-flowered pea plants were crossed with true-breeding, white-flowered pea plants. The F1 progeny all had purple flowers. If the F1 offspring are self-fertilized, what progeny phenotypes would be expected?
A. 1 purple : 2 pink : 1 white B. 3 white : 1 purple C. 3 purple : 1 white D. all purple E. all white
Goldfish are very hardy fish, which is why they have been in the pet trade for so long. They
are generalist feeders and can tolerate a wide range of oxygen concentrations as well as high levels of nitrogen (due to waste buildup in a small fish bowl). Based on this, goldfish ____________________.
a. have a large microhabitat b. have a broad ecological niche c. face almost no constraints or tradeoffs d. live in macrohabitats
Shortly after returning from a trip to several continents, a young man experiences episodes of fever, chills, muscle aches, and headache that recur at irregular intervals. The young man reports carrying only a large backpack and commonly staying in hostels along the way while traveling. Which of the following diseases is he likely to have?
A. anaplasmosis B. scrub typhus C. louse-borne relapsing fever D. Lyme disease E. yaws
The cell type that breaks down fibrous connective tissue is termed __________________?
Fill in the blank(s) with the appropriate word(s).