Of course. A group is a very large category.
The more variation there is in a group of specimens, the more evolution can occur between them.
The more variation there is in a group of specimens, the more evolution can occur between them.
genetic variation
Genetic variation. If there were no variation in the genes/phenotype then natural selection would have nothing to select from.
There must be genetic variation, the variation must be heritable, and there must be differential reproduction (due to competition).
how and why variation occur in the rate and sequence ot develpment and learning
The characteristic within the population that causes natural selection to occur is that individuals within a given population are not all identical because they vary. The other characteristic that causes natural selection to occur is that some variants are better than the others.
the change that occur from parents in the offspring
Without variation there is nothing to select from.
A variation means a change. For example, in jewelry making, there can be variation in the natural stones used to complete a piece. An entire necklace can be made of pearl beads, but natural differences of variations can occur within each pearl. Each bead is a pearl, but each pearl may not look exactly the same.
Genetic variation is one of the conditions required for Natural Selection to occur.
Variation must exist