Why do classification systems change over time? Scientists find new evidence in their studies,
Scientists use old methods of classification.
Scientists repeat experiments and find no changes.
Scientists find similar evidence to previous work.

Classification system changes because the scientists find new evidence in their studies.

Explanation: The world is always changing and growing and dying as well as developing, so over time things change. For example, as you grow up do you stay the same? No, you notice the physical changes happening, well thats sort of like how the earth and its ways are always changing as well.

each of the 46 original chromosomes splits into two daughter chromosomes, so there are two sets of 46 daughter chromosomes that end up in each cell. human cells have 46 chromosomes. each chromosome consists of a pair of identical chromatids attached together by a structure called a centromere.

the fossil record provides evidence of a common ancestor to many species.