1/27 Review for Friday's Quiz on 8.L.4

Why are index fossils used as guides to determine the age of rocks?

• Each index fossil lived during a specific geologic time period.

• Index fossils are found in igneous rocks.

• Index fossils are very rare and are not commonly found in rocks.

• All index fossils lived during all the periods of geologic time.

Humans, chimpanzees, whales, and bats all have the same bones in their arms, fins, or wings. How does this provide evidence that supports evolution?

• It demonstrates that they share the same DNA.

• It proves that they independently evolved similar structures.

• It provides evidence they evolved from a common ancestor that had these bones.

• It explains how bones may have been functional in an ancestral species but are now nonfunctional.

What type of species has the best chance of surviving through significant environmental change?

• genetically-diverse species

• genetically-similar species

• species with highly-specialized traits

• extinct species

Polar bears are naturally found in Arctic environments characterized by snow, ice, and extremely low temperatures. Which best describes an evolutionary adaptation that allows polar bears to survive in this environment?

• Polar bears have a thick layer of fur and a layer of fat under their skin.

• Polar bears are warm-blooded.

• Polar bears are carnivores.

• Polar bear mothers are protective parents.

A new predator moves into an area with a population of rabbits. The rabbits with longer back legs have an advantage because they can run faster and escape the predator. Which will be the most likely effect on the rabbit population?

• The population is likely to become extinct due to stress.

• The rabbit population is likely produce fewer offspring.

• The rabbits with shorter back legs are likely learn to hide.

• The future generations of rabbits are likely to have longer legs.

Why did Darwin's finches evolve with differently shaped beaks?

• they interbred

• they had defective genes

• they adapted to eating the same foods on different islands

• they adapted to eating different types of foods

Which of the following results in individuals being able to adapt to their environment?

• genetic variation

• homologous structures

• analogous structures

• genetic isolation

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

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

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

• People selectively breeding hamsters.
• Insect populations developing resistance to certain pesticides.
• Bacteria becoming resistant to antibiotics.
• Male birds of certain species developing colorful feathers to attract female mates.