A mineral leaves a gray trail when scraped against an unglazed porcelain plate.

Which property of a mineral is being measured?

A.

luster

B.

streak

C.

color

D.

hardness

Proofreading removes app. 99% of mismatches before DNA replication moves on. After proofreading what is the mutation rate for DNA replication in humans. A. 10^-4 mutations/base pair B. 10^-6 mutations/base pair C. 10^-8 mutations/base pair D.

What is risky behaviour

How can astronomers use rocks from the moon to estimate the age of the solar system?

A major function of a plants root is to

What is a gene? A. the different forms of a trait B. a segment of DNA that is the basic unit of heredity C. the appearance or characteristics that are seen in an organism D. an organism's allele combination

What happens to molecules in a liquid when it becomes a solid?

Is a nucleic acid that contains the genetic information for heredity in most organisms. A. a chromosome B. genetics C. a gene D. heredity E. DNA

Sandy experimented with the placement of the straw and the balloon while making this air powered toy car. He taped the straw and balloon to face toward the right. He told Tim that his toy will travel to the right. Tim said that Sandy was wrong.

You are a biomedical researcher who is interested in designing a drug to increase bone density. You have decided you can take one of two approaches: (1) design a drug that stimulates bone to be built faster, or (2) design a drug that prevents bone

Why rinse peas in disinfectant