He United States' fossil fuel shortage of makes the country dependent on outside sources.

Which compound is a reusable, complex protein that speeds up chemical reactions? A) starch B) a sugar C) a lipid D) an enzyme

The HIV virion (viral particle) is a sphere that is roughly 140 nm in diameter. What particular kind of microscope is required to visualize an HIV virion and what is the basis of this microscope's ability to provide the resolution required to

What are the legs of a chromosome called?

A solution high in salt content will have what affect on a plant cells vacuole?

Which statement best summarizes the importance of meiosis to reproduction? It produces diploid cells that are needed for sexual reproduction. It produces diploid cells that are needed for asexual reproduction.

The __ consists of the pons and cerebellum.

If you were standing at the North Pole, where would Polaris be located A) at your zenith B) on the horizon C) at your azimuth

The three main parts of a DNA nucleotide

While Michael is sleeping, his eye muscles are moving, but all other skeletal muscles are at rest. Which of the following statements about Michael is true?

Which statements describe ways that science meets society's needs? Check all that apply A scientists investigate a new way to clean up spilled oil on land B scientist developed a procedure to collect water samples for experiments C scientist improve