Evolution and Natural Selection

Who developed the Theory of Evolution by Natural Selection?

_________ (such as forelimbs) of many vertebrates indicate common ancestry in that group.

_____ has occured when successful traits build up in a population, increasing survival chances.

The nearly identical_________of vertebrates earliest development supports common ancestry.

A number of different traits passed down to offspring making each slightly different.

High amounts of_________ in common with another species also indicates common ancestry.

Under most circumstances, evolution is a very _________ process.

The percentage of a particular allele in a gene pool

The ___________states that better adapted organisms are more likely to survive & reproduce.

Genetic equilibrium must be disrupted in order for evolution to occur

The ____________ explains why organisms seem to have changed over time.

When organisms with beneficial variations survive and pass on those traits.

What did Darwin do after his voyage?

A(n) ___________________ is a group of individuals that can mate and have fertile offspring.

A population is a group of ___________________________ living together in one place.

_________ are left over structures or organs from the evolutionary past.

____________is producing more offspring than are necessary to replace the parents.

_________  indicates common ancestors using the remains or impressions of ancient organisms.

What did Darwin observe in the Galapagos Islands?