Mutation is a source but it is not the main source after it comes recombination in which 2 chromosomes with “normal” survival are taken from natural population of Drosophila and combined. Then comes immigration of genes in which the new chromosome mix in with different gene frequencies.
Ventilation is the process which the air moves in and out of the lungs. Diffusion is the movement of gases without the use of energy and or effort by the body. Hope this helps!:)
Answer:
A Hypothesis
Explanation:
The Oxford English Dictionary defines hypothesis as the following: “A supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.”
A: an ecosystems organisms become larger as succession