Which group of animals has a backbone?
Which organ helps fish breathe underwater?
Which animal is a mammal?
What is the largest organ in most animals' bodies?
Which animal undergoes metamorphosis?
What is the main function of the heart?
Which animal belongs to the reptile group?
Animals that eat only plants are called:
Which blood cells help fight infections?
Which animal lays eggs?
What is the study of animals called?
Which chamber of the human heart pumps oxygen-rich blood to the body?
Which animal is cold-blooded?
What is the basic unit of life in animals?
Which animal group has feathers?
Which part of the digestive system absorbs most nutrients?
What is the main gas animals inhale for respiration?
Which animal is an invertebrate?
What is the protective outer covering of insects called?
Which animal has a three-chambered heart?
