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O Level Notes : Biology - Hormones

zimsake Aug 29, 2021 0 500

Hormones greatly influence growth, development and activity of an organism. For example, the thyroid gland in the neck produces the hormone thyroxine which ensures normal growth and development of the body. If this hormone is lacking in a tadpole, it cannot grow into an adult frog. If it is produced in excessive amounts, metamorphosis is speeded up and a very tiny frog results.

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O Level Notes : Biology - Hormones

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