What was the dependent variable in the peacock butterfly experiments?

A. Changing predators
B. Changing habitats
C. Painting the wings
D. Clipping the hindwings
E. Getting eaten


Answer: E

Biology & Microbiology

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Although each of the following has a better chance of influencing gene frequencies in small populations than in large populations, which one most consistently requires a small population as a precondition for its occurrence?

A) mutation B) nonrandom mating C) genetic drift D) natural selection E) gene flow

Biology & Microbiology

If rotifers have a diploid number of 38, most cells in their bodies would have __________

chromosomes.

a. 38 b. 19 c. 76 d. a combination of 38 and 19

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Let us suppose that someone is successful at producing induced pluripotent stem cells (iPS) for replacement of pancreatic insulin-producing cells for people with type 1 diabetes. Which of the following could still be problems? I

the possibility that, once introduced into the patient, the iPS cells produce nonpancreatic cells II. the failure of the iPS cells to take up residence in the pancreas III. the inability of the iPS cells to respond to appropriate regulatory signals A) I only B) II only C) III only D) I, II, and III

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Evidence in support of the endosymbiotic theory includes

A) linear DNA in mitochondria and chloroplasts. B) a single membrane enclosing the mitochondria and chloroplasts. C) the presence of 70S ribosomes in mitochondria and chloroplasts. D) the presence of 70S ribosomes in mitochondria and chloroplasts and a single membrane enclosing the mitochondria and chloroplasts linear DNA in mitochondria and chloroplasts. E) the presence of 70S ribosomes in mitochondria and chloroplasts and a single membrane enclosing the mitochondria and chloroplasts.

Biology & Microbiology