Key Ideas Presentation: How Populations Change 7.13D

Open Ended

What do the plants in this image have in common?

Multiple Choice

The dogs in the image are all one species. Many dog breeds have been produced through artificial selection.

How were different traits introduced into the different breeds?

• The traits were acquired in random fashion.

• The traits were added by scientists in a lab.

• The traits were inherited to help dogs survive.

• The traits were selected for in breeding pairs.

Open Ended

Why do you think the penguin flipper and goose wing in the images look different?

Multiple Choice

Natural selection acts on populations. How do traits in a population of plants or animals change in this process?

• The traits change so that the population becomes more desirable to people.

• The traits change so that the population is better suited for its environment.

• The traits change so that the population can survive in all environments.

• The traits change so that all populations of that species can breed.

Multiple Choice

__________ selection occurs when traits of plants and animals selected by people are passed from parents to offspring. _______ selection occurs when traits of plants and animals that help them to survive are passed from parents to offspring.

• Average; Artificial

• Natural; Artificial

• Artificial; Natural

• Random; Average

Multiple Choice

Which statement is true for both artificial selection and natural selection of plants and animals?

• The offspring of the population are better adapted to their environment.

• People control the selection of traits in the parent population that will be passed on to the offspring.

• Plants and animals become more useful for people.

• Traits of plants and animals change over time.

Multiple Choice

The coqui frog lives in trees and is the symbol of Puerto Rico

The coqui frog has decreased in size over several generations as average temperature has risen. Identify and describe the process that resulted in the change in size of the coqui frog.

What has happened to the average size of the coqui frog over several generations?

• It has increased

• It has stayed the same

• It has decreased

• It changes randomly every year

Multiple Choice

The coqui frog lives in trees and is the symbol of Puerto Rico

The coqui frog has decreased in size over several generations as average temperature has risen. Identify and describe the process that resulted in the change in size of the coqui frog.

What environmental change has affected the coqui frog population?

• Decrease in rainfall

• Increase in predators

• Rising temperatures

• Lack of food

Multiple Choice

The coqui frog lives in trees and is the symbol of Puerto Rico

The coqui frog has decreased in size over several generations as average temperature has risen. Identify and describe the process that resulted in the change in size of the coqui frog.

What process best explains how the traits of the coqui frog changed over generations?

• Inherited instinct

• Selective breeding

• Natural selection

• Genetic mutation

Multiple Choice

The coqui frog lives in trees and is the symbol of Puerto Rico

The coqui frog has decreased in size over several generations as average temperature has risen. Identify and describe the process that resulted in the change in size of the coqui frog.

Why might smaller frogs have been more successful as temperatures increased?

• They made better sounds

• They could hide more easily

• They needed less food

• They were better able to survive in warmer conditions

Open Ended

A horse ranch in Texas has three new horses. Two of the horses are females and one is a male. One of the female horses is a much faster runner than the other female horse.

If you were raising these horses, how could you try to have more fast horses in future generations?