How are protein differences between species related to the evolution of those species?
Just so, how does fitness affect evolution?
Biologists use the word fitness to describe how good a particular genotype is at leaving offspring in the next generation relative to how good other genotypes are at it. A genotype's fitness includes its ability to survive, find a mate, produce offspring — and ultimately leave its genes in the next generation.
Similarly, how does protein comparisons contribute to evolutionary theory? a unique set of proteins are found in specific types of cells, such as liver or muscle cells. Cells from different species that have the same proteins most likely come from a common ancestor. basic principles of evolution are used in many different fields.
In this manner, what is meant by the diversity of life and how does that relate to evolution?
Evolution and diversity result from the interactions between organisms and their environments and the consequences of these interactions over long periods of time. Organisms continually adapt to their environments, and the diversity of environments that exists promotes a diversity of organisms adapted to them.
Why do vestigial structures persist in modern organisms?
Vestigial means structure had a use for common ancestor but not useful for modern times. This is because evolution takes many generations of time.