Why is oxygen toxic to strict anaerobes?
What will be an ideal response?
Answer: Anaerobes die in presence of oxygen due to the absence of the enzymes superoxide dismutase and catalase which would convert the lethal superoxide formed in their cells due to the presence of oxygen
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A photosynthetic electron-transport chain harnesses approximately what percentage of the sun's usable energy arriving at the surface of a leaf?
A. 8% B. 12% C. 24% D. 60% E. 95%
Four of the five answers listed below are periods of the cell cycle. Select the exception
a. G1 b. M c. R d. S e. G2
Dolly, the sheep, was the first mammal to be cloned from an adult somatic cell. Unexpectedly, she aged prematurely and died at six years old. She had characteristics of a geriatric sheep. Why was this the case?
What will be an ideal response?
Experimental plants that were sent up in space shuttle missions did not exhibit all of their normal tropisms. Which of the following responses would you most expect to be lacking from these plants?
A) gravitropism B) photoperiod C) thigmotropism D) phototropism