If a single-celled organism is found to have a nucleus which contains its DNA and a phospholipid membrane, what else can safely be assumed about it?

The doctor advising Mary about her plans for pregnancy repeatedly warns her about the consequences of toxoplasmosis. Why would the doctor give this advice?

What is the function of proton pumps localized in the plant plasma membrane?

Depolarization, the process by which muscle fibers are stimulated to contract, begins when:

A student conducts an experiment to determine how the amount of water given to a plant affects its growth. Which of the following is not a constant or control for this experiment? a. the type of plant b. the amount of soil c. the amount of water d.

According to the dietary guidelines, what should be the maximum total fat intake as a percentage of energy intake

Explain how energy flows in a food chain. DONE

A friend tells you he read somewhere that rotting garbage can turn into maggots, which are fly larvae, and the maggots then can grow into adult flies. What part of the cell theory could you use to refute his claim?

Which of these is a characteristic of climate? A. Changes weekly B. Changes every day C. Reported as a daily forecast D. Reported as a pattern over time

Genetic disorders can result when sister chromatids fail to separate properly. During which phase is this problem most likely to occur? A: g1 phase B:g0 phase C: Cytokinesis D:Mitosis

4. Which change describes a demographic transition? a. a population moves from a high birthrate and death rate to a high birthrate and low death rate b. a population moves from a high birthrate and low death rate to a low birthrate and death rate c.