RL Evolution 2020

The structures above have all the same bones yet serve different functions. They are an example of...

• Vestigial Structures

• Homologous structures

• Analogous structures

• Adaptations

Structures like the human tailbone, or appendix, which have no known function but may have served a function in the past, are called

• adaptations

• homologous structures

• analogous structures

• vestigial structures

All organisms on Earth arose from

• many common ancestors

• dinosaurs

• one common ancestor

• a eukaryotic cell

Because of the similarity in DNA sequences between humans and chimps it is believed that

• Humans and chimps share a recent common ancestor

• Humans and chimps do not share a common ancestor

• Humans evolved from chimps

• chimps evolved from humans

The strongest evidence for the close relatedness of vertebrates (organisms with a backbone) is

• Similarities in embryological structure

• They are all made of cells

• They all reproduce exactly the same way

• DNA

The fitness of an organism depend on its...

• size

• genetic diversity

• strength

• environment

Evolution is based on traits that are ...

• acquired during an organism"s lifetime

• inherited

• behavioral

• controlled by many genes

A trait that makes an organism more fit for its environment is a (an)

• mutation

• homologous structure

• variation

• adaptation

Which of the following was not available to be used by Darwin as evidence of Evolution?

• Fossils

• Homologous structures

• Variations in closely related organisms

• DNA

Which of the following statements is true about evolution?

• It starts with organisms overproducing offspring which have slightly different variations.

• It explains why organisms have specific adaptations to their environment.

• The fittest organisms are selected to survive

• All of the above