Water perpetually cycle's from the earth to the atmosphere and back. In the previous sentence what does perpetually mean?

A. constantly

B. frequently

C. occasionally

D. rarely

Water is a chemical compound that is made of hydrogen and oxygen atoms bonded together. Water makes up from 50 to 90 percent of a living organism. The remaining mass of the organism consists of a variety of carbon-containing compounds.

What is morning dew on the grass a result of?

The male hormone that declines slowly and steadily in most men until age 60 is known as

True or false: increased rate of photosynthesis is the most likely explanation as to why atmospheric co2 levels appear lowest during glacial periods of earth's history.

After DNA is duplicated, what is it called?

Match these terms and definitions.! 1. forms the pole of the spindle apparatus 2. the membrane that surrounds the nucleus of the cell 3. having chromosomes that occur singly, not in matched sets or pairs 4.

Triglycerides belong to which general class of organic molecules?

A rain forest has a high level of biodiversity because it has

Which best explains how the body maintains homeostais? A. All systems work together to match the external environment B. All systems work together to stabilize the body C. Each system works interdependently to stabilize the body D.

It is an effect that drug use can have on society? A. Drug use increases pollution. B. Drug use leads to an increase in criminal activity. C. Drug use increases the spread of disease. D. All of the above