For photosynthesis in green plants, the electron donor for the light dependent reaction is
A. RuBP.
B. chlorophyll II.
C. oxygen.
D. water.
E. carbon dioxide.
Answer: D
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Formation of urine involves filtration, reabsorption and secretion, all of which are done by the bladder.
a. true b. false
A population of snakes lives in a valley. This population of snakes is 30% black and 70% brown in coloration. A dam is built to flood part of the valley, separating the snakes into two populations
West of the human-made lake, there's a very small population of all black snakes, while east of the lake, the population is much larger and retains the same percentage of black and brown coloration as before the dam was built. What process applies to this example? A) a homozygous population growth B) genetic drift C) inbreeding D) competitive exclusion
In the experimental evaluation of a new drug, what is the purpose of a placebo?
a. A placebo increases the sample size. b. A placebo prevents errors in recording of the data. c. A placebo removes the bias of the physician in charge of the experiment. d. A placebo removes the potential psychological bias of the patient in the study. e. A placebo prevents sampling errors from compromising the results of the experiment
In nearly all cases, the one-way flow of energy through the biosphere starts with energy input from:
a. aerobic respiration b. the sun c. deoxyribonucleic acid d. ATP