Reptilian embryos are protected from desiccation by a leathery shell. Similarly, which pair of structures protects seed plantsʹ embryos and male gametophytes, respectively, from desiccation? 

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#Question id: 5843

#Unit 8. Inheritance Biology

 In homologous recombination in E. coli, the protein that assembles into long, helical filaments that coat a region of DNA is:

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#Question id: 5844

#Unit 8. Inheritance Biology

In homologous genetic recombination, RecA protein is involved in:

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#Question id: 5845

#Unit 8. Inheritance Biology

Which of the following statements is false?  In vitro, the strand-exchange reaction:

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#Question id: 5846

#Unit 8. Inheritance Biology

The bacteriophage can lysogenize after infecting a bacterium, i.e. integrate into the host bacterial chromosome by site-specific recombination, and may reside there for many generations before an excision event regenerates the viral genome in an infective form.  Which one of the following is not a component of these events?

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#Question id: 5847

#Unit 8. Inheritance Biology

A Holliday structure is a(n)

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#Question id: 5922

#General Aptitude

The last day of a Century year can not be: