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Kruka [31]
3 years ago
8

Which event marks the beginning of DNA replication?

Biology
1 answer:
Vinil7 [7]3 years ago
4 0
<span>B is the correct answer. The beginning of DNA replication occurs with the unwinding of the DNA helix by a special enzyme. The two strands that form the helix then create a replication fork. The two strands are then oriented differently, one becoming the 'leading strand' and one the 'lagging strand'. </span>
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An endangered species ___
AveGali [126]

Answer:

A.) May soon become extinct over all or most of its range

Explanation:

8 0
3 years ago
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2. How did small changes in the amount of carbon put into the atmosphere by cellular respiration, and removed
bearhunter [10]

Impact the amount of carbon in the atmosphere, the biosphere, and the

hydrosphere

Explanation:

The processes of photosynthesis and cellular respiration play a major role in the carbon cycle.

Both these processes are interconnected where the products of a process become reactants of the other process.

Carbon dioxide and water released through cellular respiration become the reactants for photosynthesis which releases oxygen needed for cellular respiration.  

The oxygen released is used by animals and human beings for respiration and releases carbon dioxide which is once again used by plants during photosynthesis. This gaseous exchange happening during these two processes helps to maintain atmospheric carbon dioxide levels stable.

In the biosphere, carbon is stored in the organic form in plants and trees. Plants absorb the external atmospheric carbon dioxide and convert it into organic form and store it as food by the process of photosynthesis.

In the hydrosphere, carbon is available as dissolved in water in the water bodies like ocean, rivers, etc. this carbon is absorbed by marine or aquatic plants to undergo photosynthesis and produce their own food. Again the organic carbon is formed and stored in the form of food which is used by other aquatic organisms.

4 0
2 years ago
Define <br> Bilateral<br> Hypoventilation<br> Hemothorax<br> Arrhythmias
levacccp [35]

Answer:

Explanation:

Bilateral symmetry is a type of body symmetry where the body is divided in to halves i.e refers to organisms that have body shapes which look like mirror images along the midline which is called the sagittal plane.

Hypoventilation is a process where little amount of air enter into the alveoli which result in a decrease in the amount of oxygen in the lungs and increase in carbondioxide produced by the lungs. It is caused by too shallow breathing or slow breathing.

Hemothorax is a condition where there is blood build up in the pleural space or chest wall and lungs.

Arrhythmias is a health condition where there is irregular heartbeat. That is the heart may beat to fast, too slow, or irregular heart rhythm.

5 0
3 years ago
Why do we have tides?
Schach [20]

The moon causes the rising and falling of the sea levels because of the gravitational effects.

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3 years ago
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Rhizoids are the _____ of bryophytes. stems roots leaves gametes
elena-s [515]
Rhizoids can be called roots of bryophytes. 
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</span>Rhizoids are long, thin cells that anchor bryophytes in the ground <span>and absorb water and minerals. </span>
5 0
3 years ago
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