Biology, 07.04.2020 01:02, awesomegrill
To map genes of a bacterial strain, conjugation must be interrupted at given times. Suppose you have Hfr cells of genotype a+b+c+d+e+strS and F- cells of genotype a-b-c-d-e-strR and you combine these two cultures in liquid medium in four blenders at time 0. After intervals of 3, 6, 9, and 12 minutes, you turn on successive blenders. The resulting cultures were then plated on medium containing streptomycin. Why?A) to eliminate non-conjugated F- cellsB) to eliminate the Hfr cellsC) to selectively eliminate cells that have taken in F+ genesD) to eliminate all non-conjugated cells
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What feature of cell theory is best demonstrated in the image
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Biology, 22.06.2019 07:00, jedmnlp5xuks
Time remaini 02: 50: 5 in the farewell speech, queen elizabeth's use of first-person point of view her to appear to be impartial and objective prevents her from addressing the audience directly allows her to share her personal thoughts and ideas, makes it seem as though she's observing from the outside, mack this and return save and evit
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