Life in Ecosystems

What is the first part of the frog's life cycle?

• egg

• adult

• tadpole

• tadpole with legs

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Elephants live in herds. The oldest female leads the herd. What are some reasons for elephants to live in a herd?

• The elephants can more easily pass diseases to one another.

• The young can learn how to defend themselves.

• The young can learn migration routes.

• Adult elephants can feed the very old or very young members of the herd.

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The northern mockingbird is common throughout the United States. Pairs of mockingbirds build nests together. Females lay three to five eggs. Which behavioral adaptation would you most likely expect from mockingbird parents to protect their offspring?

• Attacking predators while hunting food.

• Copying the songs of other birds.

• Attacking animals that go near their nests.

• Laying each egg in a different next.

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The walking catfish, an invasive species, lives in ponds, swamps, and streams in the southeastern United States. It can use its fins to move across land for short distances. It can breathe oxygen from the air for short periods of time. How might these adaptations give the walking catfish an advantage if its environment changes? Choose 2.

• It could survive without water if the pond or swamp dries up.

• It could move across land to find another body of water if it runs out of food.

• It could eat food outside of its habitat.

• It could learn to live in a forest.

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You observe an egg hatching. The offspring that comes out of the egg has flippers and a shell. Which animal below could be its parent?

• Bird

• Butterfly

• Sea Turtle

• Ladybug

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How can variations in a bird's beak affect it's survival?

• It could have trouble singing.

• It could have trouble eating.

• It could have trouble building its nest.

• It could look ugly.

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An arctic hare's fur changes from brown to white as winter begins. How could this physical adaptation help the hare in a snowy environment?

• The white fur will absorb more sunlight than the brown fur, keeping the hare warm.

• The white fur will camouflage the hare and make it less visible to predators.

• The white fur will reduce friction between the hare and the snow.

• The white fur will help the hare find food.

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NGSS.MS-LS4-4

What are two reasons a polar bear would not survive in a tropical rain forest?

• Because of its layer of blubber and thick fur, a polar bear would overheat in a rain forest.

• A polar bear would be able to survive in a rain forest.

• A polar bear's fur color would stick out in a rain forest.

• The rain would make the polar bear's fur to heavy and it wouldn't be able to walk.

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What is an example of an adaptation that helps a plant respond to a drought?

• Stems that bend toward light.

• Leaves that prevent water loss.

• Leaves that grow in groups.

• Flowers that are colorful.

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The presence of hairs is a(n) _____ trait.

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