A mutagen is

a living thing that has undergone a mutation.

an agent that causes a mutation in DNA.

a mutation that has affected one gene.

a chemical that can poison living cells.

Which individual is at the least risk for osteoporosis? thin, elderly male male weight lifter in his 20s petite asian female thin caucasian female in her 40s?

Choose all the answers that apply. Which of the following are part of the pistil of a flower? stigma, anther, style, ovary, filament

Which letter indicates the cavity that contains the digestive organs?

What are the benefits of studying biology

Lactase is an enzyme that breaks down the complex carbohydrate lactose into glucose and galactose, which can be absorbed by the bloodstream and carried to the body's cells. lactose is found primarily in dairy products.

What is a storage form of carbohydrate energy?

How Do Soils Form? A. Erosion transports mineral particles, and plants die and decay. B. Plants provide organic matter and minerals to make soil. C. Weathering breaks rocks into minerals, and plants die and decay. D.

Darwin noticed that birds that were good at finding scarce food in the winter had a better chance of surviving and producing offspring.

The chart below shows the codons that make up the genetic code and the sequence of nucleotides that corresponds to them. A mistake during DNA replication leads to a mutation in the nucleotide sequence shown below.

The ability of an enzyme to change shape when it binds to its substrate is called