IB Biology Exam Prep

Category - Biology

Which of the following is a cold-blooded animal?
  1. Chicken
  2. Protozoon
  3. Snake
  4. Whale
  5. Human
Explanation

Answer: C, Snake. Snakes, like other reptiles, are air breathing and cold-blooded animals, whose body temperature and metabolism is directly affected by the temperature of its environment.

Key Takeaway: Reptiles also give birth to soft eggs, separating them from animals such as birds that give birth to hard eggs, and mammals that generally give birth to live young. Reptiles, which include animals such as alligators and turtles, are covered in scales. Cold-blooded animals have a drop in metabolism when the temperature decreases, and are often seen basking in sunlight to maintain a high metabolism.

Editor's Note - The question was updated to remove grasshopper as an answer choice based on feedback from user.

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Additional Answers

Charles Fulco says:

Um...last time I checked, a grasshopper is an animal, and an ectotherm at that. You may want to delete this question.

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