__________ sampling can be used to estimate the population density for mobile animals and involves capturing and
releasing individuals. Fill in the blank(s) with the appropriate word(s).
ANSWER: Mark-recapture
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Bread mold can grow in a minimal medium without supplements (wild type) while certain mutated strains (mutants) can only grow in a minimal medium that is supplemented with specific intermediates found in the following metabolic pathway for arginine synthesis:
minimal ------> ornithine -------> citrulline ------> arginine, where enzyme 1 converts the precursor to ornithine, enzyme 2 converts ornithine to citrulline, and enzyme 3 converts citrulline to arginine. Which of the following would be TRUE of a strain that can grow in minimal medium containing ornithine, citrulline, or arginine, but not in minimal medium alone? A. The strain would have a mutation in the gene that encodes enzyme 1. B. The strain would have a mutation in the gene that encodes enzyme 2. C. The strain would have a mutation in the gene that encodes enzyme 3. D. The strain would have a mutation in the gene that encodes for enzymes 1, 2, and 3. E. The strain would be the wild type with no genetic mutations.
The best way to prevent desertification is to avoid farming in areas subject to ____
a. flooding b. deforestation c. acid rain d. high winds and periodic drought e. topsoil buildup
Ribosomes are ____
a. membrane-enclosed organelles b. attached to the smooth endoplasmic reticulum c. involved in polypeptide transport
d. required for DNA synthesis e. involved in polypeptide synthesis
The process illustrated in Figure 13-3 is:
a. DNA synthesis. b. translation. c. transcription. d. a frame shift mutation. e. protein synthesis