Which of the following animals do not have blood circulatory system?
Dog, Hydra, Fish, Birds, Deer, Sponges, Amoeba, Tiger, Paramecium, Cow

Which of the following groups of animals have closed circulatory system?

Which of the following statements is incorrect regarding circulatory system of fishes?

Which of the following states do not have tiger reserves in India

Which of the following blood vessels in the circulatory system of frog has more oxygenated blood

Which of the following blood vessel in the circulatory system of frog has more deoxygenated blood :-

Which of the following blood vessels bypass are present in the circulatory system before birth ?

Which of the following set of animals are triploblastic, true coelomates with open type circulatory system ?

Which among the following have open circulatory system? (i) Arthropoda (ii) Mollusca (iii) Annelida (iv) Coelenterata

Which one of the following statements is correct about the human circulatory system? (A) Blood transports only oxygen and not carbon dioxide. (B) Human heart has five chambers. (C) Valves ensure that the blood does not flow backwards. (D) Both oxygen-rich and oxygen-deficient blood gets mixed in the heart.