Which description of chromosome replication in bacteria is accurate?
a. Bacterial chromosomes are broken into individual segments containing one or more genes, which are then replicated.
b. The cell’s circular chromosome is unzipped and the strands separated before the replication process can begin.
c. Replication proceeds in both directions from the origin until both strands are complete chromosome loops.
d. The cell’s circular chromosome begins unzipping and replicating in one direction from the origin to the terminal.
c. Replication proceeds in both directions from the origin until both strands are complete chromosome loops.
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New genetic variation in a population is a critical aspect of microevolution
Indicate whether the statement is true or false
Larval salamanders eat small insects and crustaceans. These insects and crustaceans are
herbivores. Thus, the salamanders belong to the __________ trophic level.
a. first b. second c. third d. fourth
Whiteflies are common pest insects found on cotton, tomato, poinsettia, and many other plants. Nymphs are translucent and mostly sessile, feeding on their host plants' phloem (sap) from the undersides of leaves. They undergo incomplete metamorphosis into winged adults. Because whitefly nymphs cannot escape predation by moving, you hypothesize that their translucent bodies make them hard to spot
by predators. How could you directly test this hypothesis? A) Compare rates of predation on whitefly nymphs on plant leaves of different colors (for example, red vs. green poinsettia leaves). B) Compare rates of predation on whitefly nymphs coated with a nontoxic dye vs. undyed whitefly nymphs. C) Compare rates of predation on whitefly nymphs vs. whitefly adults. D) Compare rates of predation on whitefly nymphs by predators that are translucent vs. predators that are not translucent.
Over many trials, the 99% confidence interval will not include the true population parameter what percent of the time?
A. 0 percent B. 0.5 percent C. 99 percent D. 1 percent