In chloroplasts, chlorophyll is contained in flattened sacs called
a) thylakoids.
b) cristae.
c) cisternae.
d) vacuoles.
Ans: a) thylakoids.
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Which of the following is not an assumption of Hardy-Weinberg equilibrium?
A. Populations must select non-random mates. B. No selection must be taking place. C. Mutations are not occurring. D. Populations must be large. E. Individuals are not entering or leaving the population.
Respond to statements 91–95 in reference to the five kinds of
species interactions listed below. a. competition b. parasitoidism c. mutualism d. commensalism e. parasitism E 91. The relationship between a dog and a wood tick is this. M 92. The interaction between a human and the intestinal bacterium E. coli is usually this. M 93. The interaction between two closely related species of woodpeckers that live in a temperate forest is likely to be this. M 94. If a wasp lays its eggs inside the larva of a fly, the interaction is this. M 95. When a tropical bird places its nest in association with a wasp nest on the same tree, the interaction is this.
Which statement is true of all protists?
a. They are eukaryotes. b. They are heterotrophic. c. They are unicellular. d. They are symbionts. e. All of the listed responses are correct.
Why is cyanide harmless to some bacteria?
A. They break down the cyanide before it enters the electron transport chain. B. They shut off the TCA cycle until the cyanide is diluted out of the cell. C. They lack cytochrome c oxidase. D. They don't allow cyanide to cross their cell wall. E. Cyanide is deadly for all bacteria.