Bacteriophages that integrate into the host's genome do so during a ________ cycle.
Fill in the blank(s) with the appropriate word(s).
lysogenic
Bacteriophages that integrate into the host's genome do so during a lysogenic cycle.
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In most terrestrial and many aquatic ecosystems, the ________ food chain is the dominant pathway of energy flow
A) detrital B) grazing C) consumer D) heterotroph
A population of T cells was stimulated to proliferate in response to a particular antigen. A sample of 1000 stimulated cells was analyzed by fluorescence-activated cell sorting (FACS) for total DNA content
Of the 1000 cells, 400 had a 2n amount of DNA, 200 had a 4n amount of DNA, and the remaining 400 cells had between a 2n and 4n amount of DNA. Additional immunofluorescence analysis revealed that 200 of the cells were in various stages of M phase and that M phase lasted 2 hours. What is the total length of the cell cycle? A) 8 hours B) 12 hours C) 18 hours D) 20 hours E) 24 hours
Which of the following terms represents the frequency of heterozygotes in a population that is in Hardy-Weinberg equilibrium?
A) p B) q C) 2pq D) q2
Endospores are
A. resistant to destruction by radiation. B. metabolically inactive. C. living structures. D. resistant to heat and chemical destruction. E. All of these choices are correct.