Evolution

In natural selection, the selective agent is the

• humans
• mutations
• breeders
• environment

what did Charles Darwin observe in finch populations of the Galapagos Islands off the coast of South America?

• different species on different islands
• all species on one of the islands
• identical species on all the islands
• the same species as North America

Mutations are important because they bring about

• death of the organism in which they develop
• genetic variation needed for a population to evolve
• benefits for the individual, not for the population
• Hardey-Weinberg equilibrium within a population

What is the term for a feature that allows an organism to survive better in its environemtn?

• variation

• adaptation

• homologous structure

• vestigial structure

A biological ____________ is a group of interbreeding populations that is reproductively isolated from other groups.

• species
• family
• phylogeny
• hybrid

______ _________ explains how two or more organisms could evolve similar traits even though they are not related to each other.

• convergent evolution
• reproductive isolation
• derived characters
• hybrid vigor

A __________ is a branching diagram that shows evolutionary relationships.

• cladogram
• table
• derived character
• relationship tree

The scientific name for humans is _______ ____

• Homo sapiens
• Homo neandertal
• homo Sapiens
• homo sapiens

__________ characters are similar characteristics that have evolved separately in two unrelated organisms.

• analogous
• homologous
• cladistic
• phylogenic

_________ characters may or may not be similar between two organisms but they developed from a common ancestor.

• homologous
• analogous
• cladistic
• phylogenic