Which freshwater ecosystem is most productive?

A. Bog

B. Creek

C. Marsh

D. Stream

Which of the following is not a vascular plant? conifer fern moss flowering plant

What substance influences the reaction but does not participate in the reaction

As Kate is moving down the hill, what type of energy does she have? A. Sound energy B. Electrical energy C. Light energy D. Mechanical energy

Daiyo, a behavioral geneticist, is studying the interaction of heredity and environment. When he looks at monozygotic twins, what will he probably see in their phenotypes?

Which of these substances does NOT come from petroleum? A. coal B. asphalt C. plastics D. gasoline

Jane filled one transparent bottle and one brown bottle of the same capacity with pond water. She kept the first bottle in sunlight and the second in dark. After one hour she calculated the amount of oxygen present in both the bottles.

The kingdom contains all autotrophic organisms.

Bacteria cell traits

Which of the following is NOT a terrestrial biome? a desert a chaparral an estuary a tundra

Consider five independently assorting gene pairs, a/a, b/b, c/c, d/d and e/e, where each demonstrates complete dominance (a_, b_, c_, d_, and e_) and recessiveness (aa, bb, cc, dd and ee).