Gr 8 Topic #7 Review

When organisms are better adapted to their environment they will survive and reproduce more successfully than organisms less adapted. This process is called what?

• Selective breeding

• Natural Selection

• Cloning

• Evolution of all species

Sometimes bones in the front limbs of animals are very similar in structure. What do we call similar bone structures that indicate a link to a common ancestor?

• Adaptations

• Gradualism

• Homologous Structures

• Extinction

A physical or behavioral trait that helps an organism survive and reproduce in its environment is called a what?

• An adaptation

• A response to a stimulus

• A mutation

• Evolution

What is the study of organisms at the early stages of development?

• DNA studies

• Comparative Embryology

• Extinction

• Fossil Record

When looking at two birds of the same species, you notice that one has darker feathers than the other one. You also notice that one has a beak that is just a little longer. These slight differences within members of the same species are called.....

• Fossils

• Extinction

• Meiosis

• Variations

What do we call a change in a species over time?

• Adaptation

• Evolution

• Extinction

• Environmental influences

What most likely caused the finches on the Galapagos Islands to have beaks that were differnt from the finches living on the South American mainland?

• They were different types of food available on the island.
• The finches on the islands had to drink salt water.
• There were different types of predators living on the island.
• The finches on the mainland built different types of nests.

Which would NOT be considered a fossil?

• bones buried deep in the earth
• footprints harened in  mud or rocks
• imprints left in rocks
• stories passed down from generation to generation

In natural selection, the selective agent is the

• humans
• mutations
• breeders
• environment

What is another name for natural selection?

• survival of the smartest
• survival of the fastest
• survival of the biggest
• survival of the fittest