Which cell structure is present during plant cell division but not animal cell division?
a. cleavage furrow.
b. cytokinesis.
c. spindle.
d. sister chromatids.
e. cell plate.
e
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The pH in the intermembrane space of the mitochondria should be ________ compared to the matrix due to the __________
A. lower; higher concentration of H+ in the intermembrane space B. higher; higher concentration of H+ in the intermembrane space C. higher; lower concentration of H+ in the intermembrane space D. lower; lower concentration of H+ in the intermembrane space
In general, the pool of materials in living organisms is
a. much greater than the pool found in the physical environment. b. constantly changing over a wide range. c. usually equal to the pool found in the soil. d. about the same as the pool found in the physical environment. e. much less than the pool found in the physical environment.
Why is there very little physical evidence of life from rocks of the Archaean eon?
a. Those rocks have been deeply buried in most parts of the world. b. Those rocks occupy inaccessible areas of mountainous regions. c. Those rocks have been greatly eroded in most parts of the world. d. Those rocks occupy the polar regions and are thus covered by glaciers. e. Those rocks have been deposited in oceanic trenches deep in the oceans.
Which of the following is TRUE of genes that are physically located close to each other on the same chromosome?
A) They are linked and tend to be inherited together. B) They are not linked. C) They will be expressed differently in males than in females. D) They tend to not be inherited together.