Which materials typically make up the A horizon in soil?

A.) silt and pebbles

B.) sand, silt, and clay

C.) sand, silt, and pebbles

D.) sand, clay, and pebbles

Animals that feed on plants are at least in the

Why is the burning of fossil fuels a concern for scientists?

The meaning of translocation?

How is the information in a DNA molecule expressed? Through polymarase Through proteins Through organelles Through new DNA

What kind of energy might be saved up for future use?

The nerve cells in the human nervous system seldom undergo mitosis. Based on this information, explain why complete recovery from injuries to the nervous system usually doesn't occur.

A protein was purified to homo - geneity. Determination of the mass by gel-filtration chro - matography yields 60 kDa. Chromatography in the pres - ence of 6 M urea yields a 30-kDa species.

Which of the following tools should a scientist use to measure an object in meters? Electronic balance Pan balance Tape measure Thermometer

What causes nematocysts to discharge?

Why are biologists concerned about the destruction of rainforests?