Which of the following is an unanswered question about life on Earth?

A) How long has life existed on Earth?

B) What were early forms of life like?

C) Did early life arise spontaneously or did it come from space?

D) How does evolution occur?

Which property would best distinguish sediment deposited by a river from sediment deposited by a glacier? A) thickness of sediment layers B) age of fossils found in the sediment C) amount of sediment sorting D) mineral composition of the sediment

The advantage to the cell of thegradual oxidation of glucose during cellular respiration comparedwith its combustion to CO2 and H2O in a single stepis (a) more free energy isreleased for a given amount of glucose oxidized.

When you squeeze and release a spring this creates a what kiind of wave

A condition related to thiamin deficiency is known as A. Scurvy B. Beriberi C. Rickets D. Pellagra

What is the magnification of the ocular lens

The period of cell growth and development between moronic division is called?

Where does the overwhelming amount of seismic activity occur on the earth?

Treatment for a patient with congestive heart failure and shortness of breath may include

Sea corals live exclusively in the ocean and are radially symmetrical. They have microscopic stinging barbs that shoot out to immobilize their prey. This allows corals to hunt even while they are stuck to the ocean floor.

Global warming is slowly melting the polar ice caps and glaciers, which are made up of freshwater. Marine organisms in which of the following zones of the ocean are going to be most affected by this process?