How are dolphins and whales similar?

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  1. Both lay eggs
  2. Both are fish
  3. Both have scales
  4. Both breathe air

Answer (Detailed Solution Below)

Option 4 : Both breathe air
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Detailed Solution

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Given:-Similarity of dolphins and whales

(1):- Both lay eggs: This is incorrect because dolphins and whales are mammals, and mammals give birth to live young rather than laying eggs.

(2):- Both are fish: This is incorrect because dolphins and whales are mammals, not fish. While they live in the water like fish, they have many characteristics that make them mammals, such as having lungs, being warm-blooded, and nurturing their young with milk.

(3):- Both have scales: This is incorrect because dolphins and whales have smooth skin without scales. Fish have scales, but mammals like dolphins and whales do not.

(4):- Both breathe air: This is the correct statement because both dolphins and whales breathe air through the lungs. They surface periodically to inhale oxygen through their blowhole.

Hence, the correct answer is "Option(4)".

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