A) enzymes
B) hormones
C) vitamins
D) food substances
Correct Answer: B
Solution :
Substances, which originate at the tip of stem and root and control the growth of different organs are hormones. T. he term 'hormone' used by first Starling (1906). The growth hormone are also called phytohormones, term given by Thimann (1948).You need to login to perform this action.
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