Which of the following statements about water are true? Check all that apply.

Water covers 75% of the Earth

Once water is used it can never be reused.

Only 3% of Earth's water is fresh water.

Water comprises the majority of all plants and animals

Spectator at or comes from the Latin specs meaning

What contains all the oxygen and carbon dioxide surrounding earth

Different energy sources provide different benefits to individuals and the environment. What are some nonpolluting sources of energy? a. coal, oil, and natural gas. c. alcohol and acetylene. b. nuclear energy. d. wind, solar, and hydroelectric power.

Estuary ecosystems are important to humans as a source of

What quality of the nucleus allows it to be in charge of all cell processes

Compare the roles of the phospholipid bilayer in passive and active transport.

In the polymerase chain reaction (PCR) technique, a heating phase and a cooling phase alternate. An original sample of DNA would have to pass through how many total rounds of heating and cooling before a sample is increased eight times in quantity?

During interphase, replication of the genome DNA occurs during what phase of the cell cycle

Which of the following is not recycle in the biosphere A: energy b:nitrogen c:water d:carbon

An infant moves involuntarily when you touch the soles of his feet. such a movement is