What characterizes a bacterial cell that can undergo transformation?
What will be an ideal response?
competence, or ability to take up double-stranded DNA
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Species of the genus Hyphomicrobium are budding bacteria that attach to solid objects and are ________.
A. aerobic chemoheterotrophs B. able to reproduce by budding C. found in marine and freshwater environments D. All of the choices are correct.
An appendage that is an extension of the bacterial cell wall and plasma membrane is a(n) ________.
A. prostheca B. mycelium C. pilus D. flagellum
Plant species A has a diploid number of 28. Plant species B has a diploid number of 14. A new, sexually reproducing species C arises as an allopolyploid from hybridization of A and B. The diploid number of C would probably be
A) 14. B) 21. C) 28. D) 42. E) 63.
Why is crossing over not possible in meiosis II?
A. Because the enzymes needed for it to occur are no longer present. B. Because homologous chromosomes are no longer in the same cell. C. Because prophase only occurs in meiosis I. D. Because meiosis II is much shorter than meiosis I.