Many algal species have life cycles consisting of alternating haploid and diploid generations. The most common life
cycle in green algae consists of organisms that are ____ in the haploid stage and ____ in the diploid stage.
a. unicellular; multicellular
b. multicellular; unicellular
c. unicellular; unicellular
d. multicellular; multicellular
e. colonial; colonial
ANSWER: b
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The action of a white blood cell engulfing a
bacterium is a. pinocytosis. b. phagocytosis. c. exocytosis. d. endocytosis. e. phagocytosis and endocytosis.
DNA replication is
a. redundant. b. semiconservative. c. progressive. d. conservative. e. repetitive.
Portion of Figure 22.11
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Refer to the above figure for questions.
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In the life cycle of a club moss, what is the name of the structure that produces the haploid spores?
A. Strobilus B. Sporophyte C. Gametophyte D. Rhizome E. Strobilus
Since all living things contain DNA, how can there be so many kinds of living organisms and not just one?
A) all species have the same DNA, but each uses only those sections appropriate for the species B) the order of the bases is unique, not only for each species but for almost every individual as well C) all living things have the same DNA but make variable RNAs when producing the proteins that make each species unique D) different species read or decode the nucleotide sequence in different ways E) this remains one of the great unanswered questions in biology