What are hormones. Give one example for each
i) Steroid hormones
ii) Polypeptide hormones
iii) Amino acid derivatives

Organic compounds synthesized by ductless glands and carried by blood to target of the body are called hormones.
i) Steroid hormones:
Ex: Estrogen, Progesterone
ii) Polypeptide hormones :
Ex: Insulin, Glycogen
iii) Amino acid derivatives :
Ex: Thyroxine, Epinephrine