Answer: True
Explanation: I can't really explain, I'm really sorry.
The variation may already exist within the population, but often the variation comes from a mutation, or a random change in an organism's genes.
Answer:
False
Explanation:
Bacteruas are small single-celled organisms.
B. because they are not manufactured by the body
Answer:
The correct answer is - option D.
Explanation:
In algae or any other photosynthetic organism, there is the internalization of carbon dioxide gas in the reaction with water in the presence of sunlight to produce sugar molecules and oxygen gas in the atmosphere. So, photosynthesis is the process that releases or produces oxygen gas.
In cellular respiration (aerobic) the product of photosynthesis, glucose molecules, and oxygen react to produce the energy and releases carbon dioxide and water as byproducts.
So, the correct answer is - option D.
