Review Unit 5 ESH

A physical trait favored by an environmental change can be called an

• adaptation

• extinction

• possibility

• mutation

Severe population reduction reduces the gene pool

and increases the rate of genetic drift. Woolly mammoths became extinct. Elephants survived.

• Gene Pool

• Bottleneck Effect

• Founders Effect

• Gene Frequency

A small population of chimpanzees lives in a habitat that undergoes no changes for a long period. How will genetic drift probably affect this population?

• It will accelerate the appearance of new traits.
• It will promote the survival of chimpanzees with beneficial traits.
• It will increase the number of alleles for specific traits.
  
•  It will reduce genetic diversity.

A small portion of the population that is geographically isolated from the rest of the population runs the risk of decreased.

• genetic drift
• mutation rate
• natural selection
• genetic variation

Natural Selection is driven by a change in the environment and survival of the

• Smartest

• Fastest

• Most well adapted

• Biggest

Where the better adapted organisms survive to pass traits along to offspring.

• Evolution
• Natural Selection
• Extinction
• Artifical Selection

Why are advantageous traits more likely to be passed onto offspring?

• Because they are more likely to survive and reproduce.
• Because they come from dominant alleles.
• Because they come from recessive alleles.
• Because the trait is an acquired phenotype.

These moths are all the same species. The differences between their wings is an example of ________________

• Natural Selection
• Variation
• Homeostasis
• Extinction

What is it called when humans decide which traits of an organism are the most desirable and only allow those organisms with the specific, desired traits to breed.

• biological evolution

• evolution by natural selection

• selective breeding

• inbreeding

Based on these results whose blood was found in the blood stain at the crime scene?

• Bob
• Sue
• John
• Lisa