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tatyana61 [14]
3 years ago
7

Ancient atmospheric levels of gases can not be determined by?

Biology
1 answer:
Mariana [72]3 years ago
6 0

Answer:

high levels of oxygen

Explanation:

my science teacher once told me

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What describes how a large host cell and ingested bacteria could easily become dependent On one another for survival resulting i
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Answer:

The endosymbiotic theory describes how a large host cell and ingested bacteria could easily become dependent  on one another for survival

Explanation:

8 0
3 years ago
ADP is composed of adenosine attached to:
Reil [10]

Explanation:

ADP is composed of 2 phosphate groups bonded to 5 carbon atoms of ribose

glucose or sugar backbone attached to Adenine.

The answer is B.

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2 years ago
[Scientists] can create a "baseline." This gives scientists a point to compare against
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C upcoming would be the closest to future
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Which part of a seed acts as the food source for the seed as it grows underground?
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The answer is a cotyledon
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Bacteria and other microbes can be used to "clean up" an oil spill by breaking down oil into carbon dioxide and water. Two sampl
SVETLANKA909090 [29]

Answer:

Sample A

T= 21.3% and A= 21.3%

G=28.7% and C= 28.7%

SAMPLE B

T=28.7% and  A= 28.7%

G= 21.3% and C= 21.3%

Sample A would have higher melting temperature

Explanation:

According to given information, sample A contains 21.3% thymine.

Percentage of adenine in sample A= 21.3% (Since adenine base pairs with thymine, so, adenine and thymine are present in equal amount in a double stranded DNA)

Total of A+T in sample A= 21.3 + 21.3 = 42.6%

G+ C content of sample A= 100-42.6= 57.4%

Percent G content of sample A = 57.4/2 = 28.7%

Percent C content of sample A = 28.7%

SAMPLE B:

According to the given information, sample B contains 28.7% thymine.

Therefore, percent of Adenine base in sample B= 28.7%

Total of A+T content in sample B= 28.7 + 28.7 = 57.4%

G + C content of the sample B = 100-57.4= 42.6%

Percent G content of the sample B= 42.6/2= 21.3%

Percent C content of sample B = 21.3%

There are three hydrogen bonds between a GC pair while there are only two hydrogen bonds between AT pair. The DNA content with higher GC content has higher melting temperature. Therefore, sample A would have higher melting temperature.

4 0
3 years ago
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