EOG review

When freshwater and saltwater meet in an estuary, the saltwater typically flows underneath the freshwater because the saltwater is denser. What effect does this most likely have on the nutrients concentrated in the freshwater?

• They are kept close to the shore.

• They are spread out from the shore

• they are diluted by the ocean water

• they are inactivated by the ocean water

Many factors affect human health. Which term best describes diet and exercise for most adults?

• lifestyle choice

• environmental factor

• genetic predisposition

• medically prescribed behavior

Which statement about cells and sugar is true?

• both animal cells and plant cells use sugar.

• animal cells use sugar, but plant cells do not.

• animal cells do not use sugar, but plant cells do

• neither animal cells nor plant cells use sugar

Why is upwelling an important process in a marine ecosystem?

• upwelling replaces sand and gravel on beaches lost as the result of wave and tidal action.

• upwelling decreases the temperature differences between different layers of ocean water.

• upwelling cycles nutrients from decomposers along the ocean floor to producers in surface waters.

• upwelling returns salt to the surface from the benthic zone as part of the global conveyor belt current.

Tobacco has been linked to many health problems. What is the most complete list of forms of tobacco that cause cancer?

• cigarettes and snuff

• chewing tobacco and snuff

• cigarettes and chewing tobacco

• cigarettes, chewing tobacco, and snuff

Which best compares bacteria and viruses?

• bacteria are smaller than viruses.

• bacteria cause disease, but viruses do not.

• bacteria are living organisms, but viruses are not.

• bacteria have genetic material, but viruses do not.

Humans occasionally become infected with common colds and flu after flying on crowded airplanes. Which microscopic biological hazard is most likely responsible?

• food-borne bacteria

• airborne contagions

• vector-borne parasites

• environmental mutagens

Health department officials are trying to identify the source of an outbreak of an intestinal virus. Which is the most likely source of the virus?

• polluted air

• lack of exercise

• contaminated water

• poor nutritional habits

Imprints of the shells of ocean clams are often found in the rocks of the Appalachian Mountains. What do these imprint fossils most likely indicate?

• These mountains were once under the ocean.

• these mountains once had a more rainy climate

• mountain river clams evolved from ocean clams

• ocean clams evolved from mountain river clams

Why are viruses considered to be nonliving organisms?

• they do not have genetic information

• they are not able to move on their own

• they do not interact with their environment

• they are not able to reproduce without a host cell.