NCERT Important Questions Class 9 Science biology Chapter 7
Important NCERT Extra Questions
Chapter 7 Diversity in Living Organisms
NCERT Book Extra Questions for Session 2022-2023
CBSE Board and UP Board Others state Board
Why whales are not grouped in the fishes?
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Whales look like fishes. They can swim in water like them but they are not fish as they respire with lungs, have four chambered heart, diaphragm, mammary gland, hairs, etc. Whales are viviparous like any other mammal.