BIOLOGY COLLEGE

Bacteria and other microbes can be used to "clean up" an oil spill by breaking down oil into carbon dioxide and water. Two samples isolated from the Deepwater Horizon leak in the Gulf of Mexico were labeled A and B. The DNA of each was isolated and the percent thymine measured in each sample. Sample A contains 20.520.5 % thymine and sample B contains 30.730.7 % thymine. Assume the organisms contain normal double‑stranded DNA and predict the composition of the other bases.

Answers

Answer 1
Answer:

Answer:

In sample A,  

The percentage of thymine or T is 20.5 %. A = T, so the percentage of A will also be 20.5 %.  

Thus, A + T = 20.5 + 20.5 = 41 %

Therefore, G + C = 100 - 41 = 59 %

So, G = 59 /2 = 29.5 %

Also. G = C = 29.5 %

In sample B,  

The percentage of Thymine or T is 30.7 %. As A = T, so A will also be 30.7 %.  

Thus, A + T = 30.7 + 30.7 = 61.4 %

Also, G + C = 100 - 61.4 = 38.6 %

So, G = 38.6 / 2 = 19.3 %

Therefore, C will also be 19.3 %. As GC content is more found in the sample A, that is, 59 %. Hence, the sample A will possess the higher temperature to denature in comparison to B.  

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Evolution is change in a population over time and includes the gene pools of that population. How does biogeographic isolation allow for the change of gene pools over time

Answers

OPTIONS:

A) biogeographic isolation affects the random changes that take place within gene pools

B) biogeographic isolation affects the changes in gene pools that result from which organisms are breeding

C) biogeographic isolation determines who will win competition for mates

D) biogeographic isolation determines the time that populations will breed

Answer:

A) biogeographic isolation affects the random changes that take place within gene pools

Explanation:

Organisms can become splitted and isolated from each other by biogeographical factors, thereby preventing the isolated population of species from interbreeding with each other. When this occurs, the isolated population, over time, evolve separately and later become distinct from each other leading to a change in the original gene pool.

Biogeographical factors uch as habitat isolation can cause a change in the original gene of a species population which have now become isolated geographically, and thus, evolve separately.

Which choice below is an example of humans modifying the physical environment?Farmers clearing land to plant

Transportation improvements

Commercial development

Industrial development

Answers

Industrial development!

The pyruvate dehydrogenase complex converts pyruvate to acetyl coenzyme A, abbreviated acetyl CoA, which can then enter metabolic pathways such as the citric acid cycle. Identify the citric acid cycle enzyme that is mechanistically and structurally similar to the pyruvate dehydrogenase complex. Which enzyme or enzyme complex is similar to the pyruvate dehydrogenase complex? isocitrate dehydrogenase fumarase glyceraldehyde 3‑phosphate dehydrogenase α‑ketoglutarate dehydrogenase

Answers

Answer:

α‑ketoglutarate dehydrogenase

Explanation:

This is an enzyme complex ,which is analogous to pyruvate dehydrogenase. . Its catalytic activity is inhibited by it products succinyl Co A,it is also refers to as oxoglutarate dehydrogenase complex.(OGDC).

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Answers

Answer:

200 to 500 milliseconds

Explanation:

Attentional blink is a phenomenon that puts time-related limitations to the ability to utilize visual attention. When an individual must identify two visual stimuli presented one after another, the accuracy is very poor for the second stimulus if it occurs within 200 to 500 milliseconds of the first stimulus.

So, in our question, the gap is filled by 200 to 500 milliseconds.

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passed to offspring must occur

Answers

Answer:

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Explanation:

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Helps
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Answers

Answer:

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Explanation:

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