Describe an arctic summer

1 answer:

4 0

Summer temperatures in the Arctic remain cool, fluttering around zero in many places, from June through September. In fact, Arctic residents must frequently heat their homes all year long. Neighbourhoods near the sea tend to remain close to 0°C throughout the summer, but inland areas, particularly in the south, regularly reach 7°C–13°C, and hardly as much as 20°C. One reason for the opposition is that the sea ice, which gradually melts, consumes much of the sun's energy, giving little to heat the air over it.

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Answer:

Label c is correct!.......

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Light rays pass through the ______________, which opens or dilates in darkness and closes or constricts in brightness. The image

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Answer:

The correct answer will be-

1. Pupil

2. Retina.

Explanation:

Organisms are able to see the world around them thorugh the sense organs called the eyes. The structure of eye contains various modified structure which include the membranes and the attached muscles.

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Which of the following is/are required for the polymerization reaction catalyzed by DNA polymerase III?

Temka [501]

Answer:

D. I, IV, VI, and VII

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DNA polymerase III cannot start the process of synthesis of new DNA strand de novo and uses an RNA primer synthesized by primase enzyme. The polymerization activity of DNA polymerase III elongates the RNA primer in 5' to 3' direction. The primers are removed by 5' to 3' exonuclease activity of DNA polymerase I.

During polymerization, the DNA polymerase III uses existing DNA strand as a template. The four dNTPs namely deoxyadenosine triphosphate (dATP), deoxycytidine triphosphate (dCTP), deoxyguanosine triphosphate (dGTP) and deoxythymidine triphosphate (dTTP) are added to the RNA primer according to the sequence of DNA template.

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