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Class 10
Solutions to CBSE Sample Paper - Science Class 10

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

2 Chambered Fish Heart-01.jpg

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)

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CA Maninder Singh is a Chartered Accountant for the past 12 years and a teacher from the past 16 years. He teaches Science, Accounts and English at Teachoo