Q 31. (a) Define hormones'. Name the hormone secreted by thyroid gland. Write its function.
Why is the use of lodine salt advised to us?
(b) List four plant hormones.
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Explanation:
hormones are the chemical substance which helps to growth and development in the body
thyroxine is the hormone which is released by the thyroid gland
it helps in growth
the use of iodised salt is advised because it is very important in our body when in body there is lack of iodine then goitre disease is taken place
name of plant hormone
auxin cytokines gibberlism and ethylene
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