Freshwater Mammals

Why do freshwater mammals rely on aquatic environments?

• For flying

• For feeding, breeding, and sometimes for shelter

• For climbing

• For running

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What is one of their contributions to aquatic ecosystems?

• Contribute to oxygen production

• Contribute to nutrient cycling

• Contribute to water purification

• Contribute to sediment formation

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What is the conservation status of river otters in North Carolina?

• Endangered

• Extinct

• Stable

• Threatened

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What are beavers known for building?

• Nests and burrows

• Dams and lodges

• Caves and tunnels

• Hives and webs

What type of vegetation do nutrias prefer?

• Sparse vegetation

• Abundant vegetation

• No vegetation

• Desert vegetation

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What adaptation allows aquatic mammals to maintain body heat in cold water?

• Thin skin

• Thick layers of fat (blubber)

• Large ears

• Short fur

How do aquatic mammals breathe?

• Through gills

• Through their skin

• By breathing air

• By absorbing oxygen from water

Which of the following is NOT an adaptation for life in water?

• Streamlined bodies

• Thick layers of fat

• Large ears

• Specialized limbs

Which adaptation helps aquatic mammals hold their breath longer?

• Large lungs

• Specialized breathing techniques

• Thick fur

• Short tails

What is the role of dense fur in aquatic mammals?

• To attract mates

• To maintain body heat

• To help in swimming

• To catch prey