True or false? a person with a relatively small number of cones in the retinas may have trouble distinguishing colors.

From which substance are antibiotics usually derived? a. amino acids b. bacteria c. nucleic acids d. proteins

Which statement is true, with regard to the theory of evolution? A) Evolution of an entire species can often occur in a single individual organism. B) The theory of evolution is proof that evolution occurs exactly as described, and cannot be revised.

Use the following terms in the same sentence: growth rate, birth rate, death rate, emigration and immigration.

What usually happens as more forests are converted to urban developments? A. lumber production decreases B. Lumber demand decreases C. The supply of lumber goes up D. The price of lumber goes down

During alcoholic fermentation, lactic acid can accumulate in muscle cells. True False

Why where phosphates removed from dishwasher detergents

When the sun reaches the end of released into space, forming a life cycle, the expanded part will be O A. red giant O B. brown dwarf c. white dwarf O O D. planetary nebula

Modern h. sapiens differ from the archaic form in that moderns have

Arid and semiarid lands are prone to desertification because of

Which statement describes a situation that would reduce the stability of a forest ecosystem? (1) A fierce predator is removed from the ecosystem. (2) The number of producers remains constant in the ecosystem.