What unique ability do fish possess that allows them to breathe underwater?

• They have specialized lungs that extract oxygen from water.

• They absorb oxygen directly through their skin.

• They use gills to extract oxygen from water.

• They can hold their breath for extended periods.

Which of the following is a characteristic of amphibians' skin?

• It is covered in dry, protective scales.

• It is moist and permeable, allowing them to breathe through it.

• It is thick and leathery, providing insulation.

• It changes color to camouflage them in different environments.

What is a key characteristic of how reptiles reproduce?

• They give birth to live young.

• They lay soft, jelly-like eggs in water.

• They lay hard-shelled eggs on land.

• They reproduce by budding.

Which of the following is a defining characteristic of mammals?

• They are cold-blooded and regulate body temperature through their environment.

• They lay eggs and have feathers.

• They have hair or fur, give live birth, and feed their young milk.

• They undergo metamorphosis from aquatic larvae to terrestrial adults.