Natural Selection

Which of these is an example of natural selection?

• The largest animal in a population will have more opportunities for reproduction.
• Several species of organisms work together so that they all succeed.
• One species takes all the resources in an environment leaving none for others.
• Organism that are best suited to an environment tend to survive and reproduce more often.

Breed an organism for a desired trait is the definition of

• selective breeding
• natural selection
• natural breeding
• biological evolution

Evolution works by 

• individuals changing to suit their environment
• Individuals learned new traits and pass them on
• sudden change in the environment cause a species change 
• small changes pass down through many generations

A gene pool consists of

• all of the genes, including all the different alleles, that are present in a population

• some of the genes, including the different alleles, that are present in a population

• all of the genes that are present in all populations

• all of the genes, including all the different alleles, that are present in all populations

The number of times a particular allele appears in a gene pool is known as the

• population of the allele

• relative percentage of the allele

• frequency of the allele

• evolution of the allele

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

• random chance
• natural selection
• non-random mating (sexual selection)
• artificial selection

This mechanism of evolution occurs when populations migrate.

• Extinction
• Gene flow
• Genetic drift
• Natural Selection

What is this an example of?

• diversity of species
• variation
• vestigial structures
• DNA studies

What is the name of the process in which the most favorable traits are passed onto the next generation?

• Genetic drift
• Gene pool
• Gene flow
• Natural selection

Which answer is more appropriate?

• Traits are good or bad.

• Traits can be harmful or hurtful depending on the environment.

• Traits are always helpful or hurtful, regardless of the environment.

• Traits are helpful or bad.