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Practice Listening: Multiple Choice, Multiple Answers
ID: #40951
Long
Oxygen
Transcript:
Oxygen is absorbed by blood vessels and the gills. Carbon dioxide is expelled. Over millions of years, some fish developed the ability to breathe the oxygen in the air above the sea. Amphibians are able to live both on land and in water. It was the reptiles who finally conquered dry land. The leathery shells of their eggs could safeguard the embryo without needing the protection of water. When some reptiles evolved warm blood and their scales became feathers, they conquered the air as well. The only other warm-blooded creatures on Earth are the mammals. These animals nurture their young internally and suckle the offspring with milk. They are the most complex animals on the planet.
According to the transcript, which of the following statements are true about the adaptations and characteristics of animals mentioned in the video?
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