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Which of the following are animal hormones?

(A) Auxin

(B) Adrenaline

(C) Thyroxine

(D) Oestrogen

Choose the correct answer from the options given below:

Solution

✅ Correct Option: 3

The correct option is:

(B), (C) and (D) only


Explanation:

  • (B) Adrenaline: An animal hormone secreted by the adrenal glands that prepares the body for the "fight or flight" response during stressful situations.
  • (C) Thyroxine: An animal hormone secreted by the thyroid gland that regulates metabolism, heart rate, and growth.
  • (D) Oestrogen: A primary female sex hormone in animals responsible for the development and regulation of the female reproductive system and secondary sex characteristics.

Why Auxin is excluded:

  • (A) Auxin is a plant hormone (phytohormone) that plays a crucial role in regulating plant growth, cell elongation, and phototropism.

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