Which of the following is true of carbon fixation?
1.It takes place in the thylakoid membrane.
2.The carbon that is incorporated into glucose in this reaction comes from CO2.
3.Carbon fixation occurs only once in C4 plants but twice in C3 plants.
4.C4 plants use the enzyme rubisco, while C3 plants don’t use rubisco.
2
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Mutations are _____________.
A.usually weeded out of a population. B.usually neutral. C.usually beneficial. D.necessary for evolution. E.usually detrimental.
How many pairs of chromosomes does the human genome normally have?
A. 6 B. 15 C. 23 D. 38 E. 46
Examples of "new" features, which include wings on insects, flowers on plants, and feathers on birds,
are referred to as: a. preadaptations. b. allometric growth. c. allopolyploidy. d. paedomorphosis. e. punctuated equilibrium.
Which of the following matches the organisms described with the correct domain?
a. bacteria--unicellular, eukaryotic organisms that always lack cell walls b. archaea--multicellular, eukaryotic organisms that do not have cell walls c. bacteria--unicellular, eukaryotic organisms with cell walls that do not contain peptidoglycan d. eukarya--single-celled and multicellular organisms, with a defined nucleus and a variety of nutritional sources