One disadvantage of hydroelectric energy as a renewable power source is that ____
a. it causes disease-causing organisms to remain in the stream
b. it contributes to acid rain
c. it produces greenhouse gases
d. its dams block salmon from returning to streams to breed
e. it pollutes streams downriver from the dams
ANSWER: d
You might also like to view...
The defense response triggered by the mixing of two incompatible blood types is called
a. coagulation. b. agglutination. c. dehydration. d. phagocytosis. e. opsonization.
Scientists have a complete fossil record showing the evolution of horses over millions of years, with the legs becoming longer and the teeth larger, as ancestors of the modern horse adapted from living in forest to grasslands. This is an example of
A. punctuated equilibrium. B. extinction. C. a postzygotic barrier to evolution. D. gradualism. E. a prezygotic barrier to evolution.
At zero population growth:a
b = d. b. b > d. c. b < d. d. r > 0. e. r > K.
If a cell has a normal osmotic pressure of 4500 mmHg and is placed into a solution with an osmotic pressure of 3500 mmHg, what will happen to the cell?
A. The cell will lose water and its osmotic pressure will increase. B. The cell will gain water and its osmotic pressure will decrease. C. The cell will lose water and its osmotic pressure will decrease. D. The cell will gain water and its osmotic pressure will increase.