Evolution Natural Selection

Part of natural selection in which some individuals die from starvation, competition, disease, or predation.

• overproduction

• selective breeding

• struggle to survive

• successful reproduction

The trace remains of an organism that lived long ago are called _______________ and are most commonly preserved in _______________.

• minerals, all kinds of rock

• layers, granite

• fossils, sedimentary rock

• natural selection

Which of the following is not an example of natural selection?

• giraffes passing on their long tongue trait to their offspring

• insects passing on resistance to pesticides to their offspring

• farmers selectively breeding their cows to produce more milk

• male birds developing bright colored feathers to attract their mates

• dyhybrid

• adaptation

• dominant allele

• genotype

When evolutionary changes like this occur when organisms with favorable variations for a particular environment survive and pass these variations on to the next generation. This process is known as

• natural selection

• punctuated selection

• genetic engineering

• speciation

Charles Darwin’s Theory of Evolution helped to explain

• how our solar system has changed over time

• the age of the earth

• how fossils are formed

• how living things change over time

The graph shows that changes in two populations of herbivores in a grassy field. A possible reason for these changes is that

• all of the plant populations in this habitat decreased

• population B competed more successfully for food than population A did

• population A produced more offspring than population B did

• population A consumed the members of population B

A population of mosquitoes is sprayed with a new insecticide. Most of the mosquitoes are killed but a few survive. In the next generation, the spraying continues, but still more mosquitoes hatch that are unaffected by the insecticide. Which of the following best explains these results?

• The insecticide caused a mutation in the genes of the immune mosquitoes

• The mosquitoes learned how to fight the insecticide

• A few mosquitoes in the first population were immune and passed this trait to their offspring

• The insecticide caused the mosquitoes to develop an immune response that was inherited

Scientists compare organisms’ DNA to support the theory that all species share a common

• separation

• ancestor

• population

• environment

One of the major elements of natural selection is that all species have

• choices

• similarities

• stability

• variation