Answer:
Mutation and Recombination
The air that we breathe is mostly made up of nitrogen (78%). 21% is oxygen which is needed for animals and humans in respiration and 0.03% is carbon dioxide which is needed for plants to make energy in a process called photosynthesis. The bit that is left is made up of rare gases like helium and argon and methane.
Raising the temperature will denature an enzyme so that it is no longer functional. Lowering the temperature will reduce the rate of the reaction so low as to make it seem non-functional. Altering the pH above or below its optimum pH will also reduce the enzyme's activity, and at extremes the enzyme may be permanently denatured.
The correct answer is - because it increases production of glucose, which is the plants' food.
The main reason why the plants started to move from the water towards the land was that on the land they were able to produce more glucose, and the glucose is the food that the plants produce for themselves.
The increase of glucose production on the land was possible because the plants received more sunlight. The sunlight is crucial for the process of photosynthesis, in fact this process is not possible if there isn't sunlight. By using the sunlight, as well as gases from the atmosphere, the plants manage to create their own food, glucose, and the more they produce of it, the better for them, as they can grow more, live longer, and be in better condition.
