The scientific method ________.
A. is a linear process that must be precisely followed at all times
B. is undertaken only by trained scientists in a controlled laboratory setting
C. is a rough recipe for answering questions, but the steps need not always need to be performed in the same order
D. is the means by which absolute truth can be uncovered
Answer: C
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Why isn't oxygen produced by organisms that perform anoxygenic photosynthesis?
a. their photosystems do not utilize the Calvin cycle b. they use a different enzyme for the initial reactions of the Calvin cycle c. they use electron donors other than water d. their membranes lack ATP synthase e. their chlorophyll contains an iron center rather than magnesium
Members of this group are characterized by a multinucleate amoeboid-like feeding form called a
plasmodium. a. plasmodial slime molds b. water molds c. ameobozoa d. brown algae e. cellular slime molds
Why do pine trees have two different types of cones?
A) One type produces the gametophyte, the other type produces the sporophyte. B) One type produces ovules, the other type produces pollen. C) One type is produced in the fall, the other type is produced in the spring. D) One type produces seeds, the other type produces fruit.
Which of the following would you expect of a eukaryote lacking telomerase?
A) a high probability of somatic cells becoming cancerous B) an inability to produce Okazaki fragments C) an inability to repair thymine dimers D) a reduction in chromosome length in gametes