In which of the following groups of organisms, blood flows through the heart only once during one cycle of passage through the body?
(A) Rabbit, Parrot, Turtle
(B) Frog, crocodile, Pigeon
(C) Whale, Labeo, Penguin
(D) Shark, dog fish, sting ray
Answer -
- In a 2 chambered heart , blood flows only once during one cycle of passage through the body
- Fishes and most of the aquatic animals have only two chambers to their hearts
From our options
- Option A - Rabbit is a mammal, Parrot is a bird, Turtle is a reptile . Since all are not fishes, it is not correct
- Option B - Frogs are ambhibians , Crocodile is a reptile, Pigeon is a bird, Penguin is a mammal . Since all are not fishes, it is not correct
- Option C - Whale is a mammal, Labeo is a fish, Penguin is a mammal . Since all are not fishes, it is not correct
- Option D - Sharks are fishes. So are dog fish and stick ray. Since all are fishes, this option is correct .
So, the correct
answer is (d)
