Question

Match the following:

• A. (i – c), (ii – b), (iii – d), (iv – a)
• B. (i – b), (ii – c), (iii – a), (iv – d)
• C. (i – a), (ii – c), (iii – b), (iv – d)
• D. (i – a), (ii – c), (iii – d), (iv – b)

Hint:

Photoperiod is light duration; circadian rhythms are daily; circannual are yearly; photoperiodism is biological response to light cues.

Answer 1

The Correct Option is A

Step 1: Understand the terms in List-I.
- Photoperiod: Duration of light hours in a day that an organism is exposed to.
- Circadian rhythms: Biological rhythms repeating approximately every 24 hours.
- Circannual rhythms: Biological rhythms that repeat annually.
- Photoperiodism: Organism’s response to photoperiod, especially in plants and animals for growth and reproduction.

Step 2: Understand List-II.
- a) Response of organisms for the photoperiod
- b) Biological rhythms repeat every 24 hours
- c) Duration of light hours to light in a day
- d) Biological rhythms repeat annually

Step 3: Match each term with its correct definition.
- Photoperiod → c (duration of light hours in a day)
- Circadian rhythms → b (biological rhythms repeat every 24 hours)
- Circannual rhythms → d (biological rhythms repeat annually)
- Photoperiodism → a (response of organisms to photoperiod)

Step 4: Check consistency.
- Each term in List-I correctly matches with its description in List-II.
- No term left unmatched.

Step 5: Conclusion.
- Correct matching: (i – c), (ii – b), (iii – d), (iv – a).