What do the letters D-N-A stand for?
A. Dioxyribonuclear acid
B. Deoxyribonucleic acid
C. Deoxyrobonuclear acid
D. Dioxyribonucleic acid
Answer: B
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Membrane potential will affect the directional movement of
A. Glucose (C6H12O6) B. Cholesterol C. Potassium (K+) D. Oxygen (O2)
A one-way relationship in which one species benefits at the expense of another is called ____
a. commensalism b. symbiosis c. parasitism d. mutualism e. interspecific competition
The Environmental Protection Agency estimates that approximately ________% of rural wells and water systems have some type of pollutant in them
Fill in the blank(s) with correct word
Energy flows from a lower trophic level to a higher level when organisms at a lower level are eaten by organisms at a higher level. Approximately what percentage of the total energy can possibly be passed on to the next trophic level?
A) 75% B) 90% C) 10% D) 30%