A replication bubble forms as the DNA unwinds.
Option C
<u>Explanation</u>:
Replication bubble is the space where the strands of double helical DNA structure are separated with the help of DNA helicase. The strands of the double helical DNA are still in the helix form on the both end of the unwinded DNA stand which gives this region an appearance of a bubble.
DNA unwinding is the first step in replication or transcription of the DNA molecule. DNA helicase separates the two types of "DNA" that are connected by hydrogen bonds with the help of ATP hydrolysis.
Answer:
The reactants are the Products of Photosynthesis which is glucose and oxygen.

Explanation:
Activation energy ........
Explanation:
Unclear question. However, I inferred you are referring to this clear rendering of the question:
Determine the degree of pollution with household waste in your neighborhood or your locality:
1. List the human and administrative (social) causes that led to such a situation.
2. What actions must be taken to solve the given problem?
3. What should be your contribution in solving the problem of environmental pollution?
4. Write an essay on the topic: "My community - the beneficial space for work."
after the evolution of the first living cells, fermentation wasn't needed, because aerobic respiration was now doable, since there was more oxygen in the air now. also, as the temperature increases, it becomes more energy consuming to conduct fermentation over aerobic respiration.
Hope this helps :)