Answer:
Explanation:
"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 19.3 % thymine and sample B contains 29.7 % thymine. Assume the organisms contain normal double‑stranded DNA and predict the composition of the other bases."
DNA is made up of four bases: Adenine (A), Thymine (T), Cytosine (C) and Guanine (G).
- Adenine and Thymine are paired and are joined by two hydrogen bonds: A-T.
- Cytosine and Guanine are paired and are joined by three hydrogen bonds: C-G.
If Sample A contains 19.3% thymine, therefore it contains the same percentage of adenine. Added together 19.3+19.3=38.6%.
Since A-T is 38.6%, therefore C-G is 100 - 38.6% = 61.4%
Dividing 61.4% in half, C and G are 30.7% each.
In summary, for Sample A:
Adenine = 19.3%
Thymine = 19.3%
Cytosine = 30.7%
Guanine = 30.7%
For Sample B, since thymine is 29.7%, adenine is also 29.7%
So A-T is 29.7 +29.7 = 59.4%
C-G = 100 - 59.4 = 40.6%
Dividing 40.6% in half, C and G are 20.3% each
In summary, for Sample B:
Adenine = 29.7%
Thymine = 29.7%
Cytosine = 20.3%
Guanine = 20.3%
B because eyes is a sense organ.
Explanation:
It's because the trees want to save the water they have collected during harsh conditions. That is why they shed their leaves in the fall to reduce the rate of loss of water by transpiration. Hence their main source of lass of water is removed and only few percent of water is lost which is through the lenticels
According to the behaviorist perspective, an organism learns the association between two stimuli because they are paired together, not because the organism knows that one stimulus will follow another and this is true because behaviorist relate to the study of human/animal behavior to learn.
