If energy gain remained constant over time, the bird would maximize energy gain by staying on the tree forever.
a. true
b. false
Answer: a. true
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Altering patterns of gene expression in prokaryotes would most likely serve an organism's survival by _____
A) organizing gene expression, so that genes are expressed in a given order B) allowing each gene to be expressed an equal number of times C) allowing an organism to adjust to changes in environmental conditions D) allowing young organisms to respond differently than more mature organisms E) allowing environmental changes to alter a prokaryote's genome
You are studying two traits in fruit flies: 1. eye color where there are two colors, brown and red 2. wing shape where there are straight and curled phenotypes
You mate two flies that are heterozygous for the genes that control both of these traits and get the following phenotypes in the following ratio: 9 red and straight; 3 red and curled; 3 brown and straight; 1 brown and curled Which phenotypes are dominant? What will be an ideal response?
The occurrence of which of the following events would indicate that a population was not in Hardy-Weinberg equilibrium? a. Mating is random
b. All individuals survive and produce the same number of offspring. c. No gene flow occurs between the population and others of that species. d. Mutations are rare.
Discuss factors that must be taken into account when setting standards for safe levels of exposure to potentially
harmful chemicals in the environment. Explain why setting these standards is such a complex task. What will be an ideal response?