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%
Ans: C) 10%
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The human genome contains about how many genes?
a. 1,000 b. 10,000 c. 20,000 d. 100,000 e. 200,000
Excess tissue fluid becomes lymphatic fluid that eventually enters the blood stream.
Answer the following statement true (T) or false (F)
more efficient in producing carbohydrates
b. predominates in C3 plants in cool weather when water is plentiful. c. predominates in C4 plants on hot days. d. produces the same amount of PGA. e. does none of these.
The aquatic plant Elodea is commonly used to study photosynthesis. You put some Elodea in a test tube filled with water containing radiolabeled oxygen (18O), shine light on the test tube, and measure the rate of photosynthesis by counting oxygen bubbles released. At the end of your experiment, you would find the most 18O in
A. glucose. B. carbon dioxide. C. O2. D. in water for the most part, as water is not used in photosynthesis. E. in ATP.