ES Ch. 5 Evolution & Community Ecology Test

A change over time is 

• evolution
• fitness
• speciation
• mutation

Traits that improve an organism's chance of survival are passed on more frequently to future generations than traits that do not is 

• extinction
• genetic drift
• artificial selection
• natural selection

An accidental change in DNA is a 

• evolution
• adaptation
• mutation
• gene

A heritable trait that increases an individual's fitness is a(n)

• evolution
• adaptation
• mutation
• gene

The process of selection conducted under human direction is 

• extinction
• genetic drift
• artificial selection
• natural selection

The disappearance of a species from Earth is 

• extinction
• genetic drift
• artificial selection
• natural selection

_____ occurs when individuals immigrate into or emigrate out of a(n) _____.

• Reproduction, population
• Survival of the fittest, gene pool
• Genetic drift, gene pool
• Migration, population

Natural selection is also known as _____. 

• genetic drift
• survival of the fittest
• migration
• population

If a natural disaster killed all but a few organisms in a population, the gene pool of the next generation would reflect the genes of these few survivors.  this would result in 

• migration
• genetic drift
• mutation
• adaptation

For allopatric speciation to occur, how long must populations remain separated?

• 2 generations
• 500 years
• generally thousands of generations
• forever