A mutagen is

A) a living thing that has undergone a mutation.

B) an agent that causes a mutation in DNA.

C) a mutation that has affected one gene.

D) a chemical that can poison living cells.

Which of the following may happen to astronauts when they return to Earth from space? They may feel dizzy because the flow of blood to and from the heart to the brain is affected in space.

What is the average for the following measurements 7.1 g, 9.8g, 2.3g, 8.5g, 7.4g, 5.7g

Why would a rough, steep mountain habitat have a higher rate of speciation than a large, open grasslands habitat?

Healthy soil depends on? A. The size of rock particles B. Oxygen content C. Moisture content D. All of the above

Which of the following statements concerning immunological memory is true? A. The memory response involves only B cells. B. The memory response is due to production of long-lived memory cells that can respond very rapidly upon second exposure. C.

What does the endosymbiont theory explain about the origins of plant and animal cell

Suppose you have monohybrid pea plants in your garden and find that they produce round seeds to wrinkled seeds in the ratio of 3:1 if the alleles are designated R and r, respectively, what are the probable genotypes of the wrinkled seeds produced by

What is the average for the following measurements 7.1 g, 9.8g, 2.3g, 8.5g, 7.4g, 5.7g

Why is it that patches placed on the skin can be used to deliver medications to the bloodstream?

What is the correlation between women's education and family size?