Animals Through Time Review Mystery 4-6 + Ecosystem Changes

An example of selection is breeding only iguanas that are blue in order to get the bluest iguana possible.

• True

• False

There are so many different varieties of dogs because....

• people chose to breed dogs with traits they wanted.

• dogs wanted to be different from each other.

• dog babies (puppies) were different from their parents.

• dogs have a lot of puppies.

How did dairy cows become so good at producing milk?

• They are cows.

• People bred the cows that produced more milk.

• All cows make milk.

Can scientists just create an animal using ANY 2 animals?

• Yes

• No

Examples of using selection include:

• fast horses, house cats, and cows.

• teddy bears.

• creating a giraffe-iguana

What is selection?

• Being picky.

• Selection is selecting the traits you want in an animal and breeding animals that have that trait.

• Selecting your pet.

 Why do chickens that live now produce bigger eggs than chickens that lived a long time ago? How did that happen?

• It just happened
• Human's told the chickens to make bigger eggs. 
• Chickens produce bigger eggs now because people bred the chickens that produced the biggest eggs.

What is the difference between natural selection and artificial selection?

• Natural selection happens without humans, and humans use artificial selection to get traits they want in living things

• Artificial selection happens without humans and humans use natural selection to get the traits they want in living things.

• Both of them happen without humans

• Humans use both of them to get the traits they want in living things

Humans are part of the ecosystem and therefore impact it. Which of the following events in an ecosystem may produce a negative effect?

• Preventing deer from depleting food resources.

• Restoring a natural habitat.

• Wildlife rangers minimizing disturbances.

• A lumber company clearing a forest.

Tags

NGSS.MS-ESS3-4

NGSS.MS-LS2-1

NGSS.MS-LS2-4

Alligators are the large predators that eat many of the smaller animals in a swamp. How might removing the alligators from a swamp habitat create a decrease in plants?

• Meat-eating animals would begin eating plants.

• The plants in the swamp would get more sunlight.

• More plant-eating animals would survive.

• Plants would not be able to spread their seeds.