QUESTION 4 a. Name the five known groups of plant hormone. (5 marks) b Explain the mechanism of action of plant growth retardants. Include ONE (1) industrial use of growth retardants in your answer. (5 marks) C. The diagram below shows part of the digestive system of a human. X i. Name the organ X of human digestive system. (1 mark) ii. Briefly explain the main function of organ X in digestive system. (4 mark) d. Explain FIVE (5) functions of microglia during viral infection in the brain. (5 marks) e. Explain \"Secondary hypogonadism\" and THREE (3) of its symptoms. (5 marks) (Total: 25 marks)
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The five known groups of plant hormones are auxins, gibberellins, cytokinins, abscisic acid, and ethylene. b. Plant growth retardants work by inhibiting the synthesis or action of plant hormones, particularly gibberellins. They can reduce stem elongation, promote Show more…
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