The changes in the biochemical composition and physiology occurring at regular intervals in 24 hours is termed as:
Correct answer: C. circadian rhythm
- A. geoannual rhythm
- B. lunar rhythm
- C. circadian rhythm
- D. tidal rhythm
Explanation
Circadian rhythms are intrinsic 24-hour cycles that affect physiological, mental, and behavioral functions in living organisms. These rhythms align with the Earth's rotation, resulting in predictable changes in response to light and dark cycles. The incorrect options are:Geoannual rhythm: Relates to yearly changes, not daily.Lunar rhythm: This rhythm is based on the moon's phases, approximately 29 days long.Tidal rhythm: These rhythms are dictated by tidal patterns, typically occurring over about 12 hours, not 24 hours.
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About Plant Growth Regulators
Plant growth regulators are chemical messengers that control growth, development and responses to the environment. The topic covers auxins, gibberellins, cytokinins, abscisic acid and ethylene, including cell elongation, apical dominance, tropisms, seed germination, dormancy, fruit ripening and leaf fall, with growth promoters distinguished from inhibitors.
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