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nydimaria [60]
3 years ago
5

Which of the following practices that are needed to run a nuclear power plant has a negative impact on both air and water?

Biology
2 answers:
Elenna [48]3 years ago
7 0

The option here is B i just took the test

Stels [109]3 years ago
3 0

The correct option is B

Uranium is a radioactive element and its mining has many disadvantages. Th principal disadvantage of uranium mining is its radiations, which can cause severe health problems. The mining of uranium also have serious negative impacts on both air and water. Both the quality and the quantity of surface water and underground water are usually affected negatively by uranium mining.

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Consider an experiment in which an Hfr strain of E. coli bacteria with the StrS, his , met alleles in its genome is mixed with a
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Answer:

F-: StrR, his+ and met+

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the strain Hfr is a high-frequency strain of recombination that includes the F plasmid (fertility factor). Therefore, the whole genome sequence is able to be passed via Hfr to its receiver, but it needs a long duration of physical contact with the recipient because the recipient gets a gene (long time physical contact is seldom attained) and retains the F strain. Also, genomes from the F-cells are not passed backwards to the HF cells. Therefore, only F strain with tolerance to Streptomycin and capable of synthesizing its amino acids on limited media can thrive in this situation. Which is F-: StrR, his+ and met+ recombining.

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<u>Answer</u>: Bacteria through the nucleoid (number 5).

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Furthermore, they differ in their capacity to mutate and adapt to environmental changes. Bacteria have a simple internal structure that lacks any organelles and are very adept at adapting to environmental changes. Besides their capacity for high mutation rates, they are also capable of picking up genetic information from their environment through a process called <em>transformation</em>.

Through transofrmation, environmental DNA enter the living bacteria through its cell membrane. Double stranded DNA will have one strand dissolved through hydrolysis, whereas the second strand may recombine with the bacterial <em>chromosome (nucleoid)</em>. Thus, this new genetic material will become incorporated into the bacterium's genome.

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