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.
Autism, Schizophrenia, leukemia,
could you give me brainliest if correct?
As stated above, breathing is the biological process of inhaling and exhaling of the gases between the cells and the environment. The mechanism of breathing involves various respiratory structures such as the windpipe, lungs and nose. Respiration, on the other hand, is a chemical process that takes place in the cell.
B.) A dog walks to a stream and drinks when it gets thirsty
would have to be your answer..
I believe it would be polyphyletic.
Polyphyletic groups are formed when two lineages convergently evolve similar character states. Organisms classified into the same polyphyletic group share phenetic homoplasies as opposed to homologies. The key difference between paraphyletic and polyphyletic groups is that paraphyletic contain their common ancestor, whereas polyphyletic groups do not.
