Which statement about birds is true?

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Study for the Academic Decathlon Science Exam. Prepare with interactive quizzes featuring multiple choice questions, complete with hints and thorough explanations. Elevate your science skills and get ready to excel on the test!

Multiple Choice

Which statement about birds is true?

Explanation:
Birds are vertebrates with feathers, a defining trait that sets them apart from invertebrates. They also have a beak, and in modern species they typically lack teeth. Their breathing relies on lungs with air sacs, not gills. Putting these ideas together, the statement that birds have feathers, a beak, and usually no teeth describes their biology accurately. (Note that some ancient birds did have teeth, but today’s birds do not.)

Birds are vertebrates with feathers, a defining trait that sets them apart from invertebrates. They also have a beak, and in modern species they typically lack teeth. Their breathing relies on lungs with air sacs, not gills. Putting these ideas together, the statement that birds have feathers, a beak, and usually no teeth describes their biology accurately. (Note that some ancient birds did have teeth, but today’s birds do not.)

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