There is a population of beetles living in a forest. Some are light colored, and some are dark. A company has begun cutting the trees down, and the habitat of the beetles has changed. It used to have trees with both light and dark colored bark. However, most of the trees with dark bark have been cut down. Which graph shows how the beetle populations will most likely be affected by the change?

Marnie has an aquarium. Several months ago, she put two fish with long tails into the aquarium. The fish reproduced and had several offspring: some with long tails and some with short tails. Marnie separated the fish with shorter tails and left only the ones with long tails in the tank. She repeated the process three more times, until she was left with only long-tailed fish in her aquarium. How does Marnie’s experiment explain the difference in the fishes’ tails?

Scientists have found that a type of moose, the Isle Royale moose, has slowly become smaller in size over time. The scientists measured the size of the skulls of moose over several generations to identify this pattern. The population of Isle Royale moose has increased during this period. What could explain the difference in size of the moose?

A rug sits in a sunny place on the floor for a long time. Kiara thinks that light from the sun can cause the rug’s color to fade over time. Can light from the sun cause the rug’s color to fade?

Malachi uses some glue to fix a broken plate. He puts the glue under a desk lamp but the glue doesn’t dry. Then he puts the glue out in the sun and it dries. Why does light from the sun dry the glue when light from the desk lamp does not?

The part of an organism that is responsible for giving the instructions to make protein molecules.

The process by which the distribution of traits in a population changes over many generations.

Individuals with adaptive traits are more likely to _________ and ____________.