Comparative Endocrine Systems in Animals · NCERT Biology

Which statement best describes comparative endocrine systems across animals?

  1. All animals have identical endocrine glands
  2. Complexity increases from invertebrates to vertebrates
  3. Invertebrates lack hormonal regulation
  4. Endocrine control replaces nervous control in evolution
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Correct answer: Complexity increases from invertebrates to vertebrates

Endocrine systems become more complex with evolutionary advancement. Vertebrates show the highest degree of specialization.

Difficulty: Medium Question 18 of 20

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