What is critical in photoperiodism?
Correct answer: B. Length of dark period
- A. Length of light period
- B. Length of dark period
- C. Both Options A and B are correct
- D. None of these options is correct
Explanation
Both the length of the light period and the length of the dark period play important roles in photoperiodism. But, only length of dark period is critical in photoperiodism, because if plants are grown according to their short or long priods but only if their length of dark period is interrupted by a small period of light then their flowering is prevented.
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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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