Which one of the following is resistant to enzyme action?
Correct answer: A. Pollen exine
- A. Pollen exine
- B. Leaf cuticle
- C. Cork
- D. Wood fibre
Explanation
Pollen exine is resistant to enzyme action because it is a tough, outer layer of a pollen grain that protects it from environmental factors, including enzymatic degradation.
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Human reproduction covers the male and female reproductive organs, gamete formation, fertilization, implantation and hormonal regulation. The menstrual cycle includes ovarian and uterine changes controlled by pituitary and ovarian hormones, while sexually transmitted diseases are studied through their causes, transmission, symptoms, prevention and effects on fertility.
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