The heat in earth's interior comes from which of the following sources?

A. The mantle

B. The sun

C. Breakdown of unstable elements

D. Meteorite impacts

All instructions for formatting characteristics (proteins) are carried on ...

By which pathway does oxygen flow into the body? A) trachea, bronchioles, bronchial tubes, alveoli B) trachea, bronchial tubes, bronchioles, alveoli C) trachea, alveoli, bronchioles, bronchial tubes D) trachea, alveoli, bronchial tubes, bronchioles

A gene exists as two alleles in a population of freely mating individuals. if 40% of the population carries the recessive allele (a for the gene, what percentage of the population has the homozygous recessive aa genotype?

Carbon dioxide in the atmosphere traps heat. Scientists are concerned that too much carbon dioxide is being released into the air by human activity.

Why do amphibians live near water? a. to prevent drying out and as a food source b. to prevent drying out and to lay their eggs c. to prevent dring out and to have water d. to prevent drying out and to be close to flora for protection

If a sample of the heat-killed bacteria is treated with a DNase would you expect transformation to occur? Explain.

What systems are involved in human reproduction?

Which component of Earth and its environment does not play a role in the carbon cycle? A. The lower atmosphere B. The rocks C. The oceans D. The magnetic field

What is pie like math type pie

What causes the movement of calcium and sodium ions in and out of cardiac cells?