Within a differentiated B cell, the rearrangement of DNA sequences between variable regions and joining regions is accomplished by a(n)_____
A) RNA polymerase
B) reverse transcriptase
C) epitopase
D) recombinase
D
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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
Scientists estimate that carbon dioxide in the atmosphere has increased by 35% in the last 150 years
Indicate whether the statement is true or false.
Which kingdom would include an organism that is multicellular and makes its own food?
A) kingdom Animalia B) kingdom Fungi C) kingdom Plantae D) kingdom Protista
Which of the following statement is TRUE?
A. Endospores allow a cell to attach to surfaces within the host. B. Endospores are extremely resistant structures that can survive high temperatures. C. Endospores are used by bacteria for reproduction (binary fission). D. One bacterial cell produces manyendospores.