Answer the question by using the accompanying graph. The optimal pH for enzyme 1 is ____
a. 2
b. 3
c. 4
d. 7
e. 8
ANSWER: b
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What is the definition of endocytosis?
A. The transport of large molecules out of the cell. B. The entire plasma membrane turns itself inside out. C. The digestion of larger molecules that were brought into the cell. D. The transport of large molecules into the cell.
Atmospheric O2 is actually a waste product of photosynthesis
Indicate whether the statement is true or false.
Two Australian animals, the spiny anteater and the platypus, both ________
a. have become invasive species on other continents b. went extinct recently due to habitat degradation c. are marsupials d. are monotremes
Cuvier, an anatomist and paleontologist, proposed
that a. all present-day organisms have descended, with adaptations, from one—or possibly a few— original organisms. b. the earth’s history has been marked by several periods when destruction of populations was widespread and that, after each such period, the earth was repopulated. c. evolutionary changes in organisms are caused by use and disuse. d. although evolution is responsible for all the changes that happen to species, one center of creation resulted in the original members of each species. e. none of these are true.