Answer:
C) Three hydrogen bonds will form with guanine.
Explanation:
Generally the DNA molecule is made up of Purines bases of Adenine and Guanine,and Pyrimidine of Cytosine and Guanine.However,RNA contains a different pyrimidine of Uracil.Thus the pairing is A-U am C-G.The uracil replaces Thymine.
The structure above is a Pyrimidine,because it is made up of single ring structure(an heterocylclic aromatic structure) compare to double structure of purines. Heterocyclic means it is ring form.Aromatic means it has resonance bonds which shift with the rings for stability.
It is also contains of two substitutes at position 4 of the ring structure (amineNH2) and at 2 which is the Keto group(=0).Therefore the structure is Cytosine.
In RNA structure the Cytosine pair with the three hydrogen bonds with guanine,while Adenine pair with Uracil.This ensures stability of the RNA structure.
Carbon dioxide often cylcles through the atmosphere every 350 years
Answer:
<em>It is the outermost covering of a cell that separates the contents of the cell from its external environment. </em>
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<em>It only allows the entry and exit of some materials. It also prevents the movement of some. Therefore, it is also called a selectively permeable membrane.</em>
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<em>Some substances like carbon dioxide and oxygen can move across the cell membrane due to the process known as diffusion.</em>
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<em>Water also obeys the laws of diffusion. The movement of water molecules through a selectively permeable membrane is called osmosis.</em>
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<em>Pls mark as brainliest.</em>
The answer is organism.
Reason why:
A species is an environment of related organisms. A community is a population of common goals. A population is a headcount of how many animals there are of one animal kind.
4) rainfall
the factors that affect the soil formations are the amount and seasonal distribution of temperature and rainfall. Climate<span> controls the type and effectiveness of </span>weathering<span> of the parent material, the quantity of water seeping through the soil and the type of micro-organisms present therein.</span>
