In a hypothetical situation, a bacterium lives on the surface of a leaf, where it obtains nutrition from the leafʹs nonliving, waxy covering, while inhibiting the growth of

other microbes that are plant pathogens. If this bacterium gains access to the inside of a leaf, it causes a fatal disease in the plant. Once the plant dies, the bacterium

and its offspring decompose the plant. What is the correct sequence of ecological roles played by the bacterium in the situation described here? Use only those that

apply.

1.  nutrient recycler          2.  mutualist            3.  commensal              4.  parasite          5.  primary producer

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#Question id: 5836

#Unit 8. Inheritance Biology

Nonreciprocal recombination, or ___, results from DNA repair synthesis that occurs during the recombination process.

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#Question id: 5837

#Unit 8. Inheritance Biology

Which of the following lead(s) to a point mutation?  

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#Question id: 5838

#Unit 8. Inheritance Biology

In the Holliday model describing recombination

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#Question id: 5839

#Unit 8. Inheritance Biology

During recombination in E. coli, ________ recognize(s) regions of sequence similarity and promote(s) strand invasion, while ________ bind(s) to a Holliday junction promoting strand migration.

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#Question id: 5840

#Unit 8. Inheritance Biology

The sequence of proteins used in bacterial recombination is

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#Question id: 5841

#Unit 8. Inheritance Biology

How are the BRCA proteins and their genes implicated in breast cancer?