Mechanisms of Evolution

All of these finches have different shaped beaks, they are an adaptation to gain access of

• Water

• Food

• Shelter

• Mates

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

Genetic drift is change in the allele frequency of a population due to...

• random chance

• natural selection

• non-random mating (sexual selection)

• artificial selection

A(n)________ is a measure of how common a certain allele is in a population.

• Allele Frequency

• Gene Pool

• Genotypical Number

• Genetic Drift

The exchange of genes between two populations.

• Genetic Drift

• Founder Effect

• Gene Flow

• Genetic Recombination

This term refers to the total genetic information found in a population; the complete collection of all the alleles found in a population

• Gene library

• Genome

• Gene pool

• Allele pool

What mechanism of evolution occurs when allele frequencies change over generations due to random chance?

• Genetic Drift

• Mutation

• Natural Selection

• Gene Flow

Evolution occurs in

• individuals at one point of time

• populations at one point of time

• individuals over time

• populations over time