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The plant responds to photoperiods due to the presence of
Options
(a) phytochromes
(b) stomata
(c) enzymes
(d) phytohormones
Correct Answer:
phytochromes
Explanation:
Phytochrome is a pigment involved in the perception of photoperiodic stimuli controlling flowering, lettuce seed germination and other morphogenetic phenomenon. The phytochrome exists in two forms : the phytochrome red absorbing form (Pr) and the phytochrome far-red absorbing form (Pfr).Scientist consider the Pfr form to be the physiologically active form. Phytochrome is a blue-green pigment existing in two interconvertible forms. One form Pfr or P₇₃₀ absorbs far-red light and the other Pr or P₆₆₀ or P₆₈₀ a
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- The members of which of the following phyla possess specialized stinging cells
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Topics: Plant Growth and Development
(126)
Subject: Biology
(4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Thermal cycle is used in
- The members of which of the following phyla possess specialized stinging cells
- The entry of pollen tube into the ovule through micropyle is called
- Which among the following is the principal cation in the human blood?
- Vomiting centre is located in the
Topics: Plant Growth and Development (126)
Subject: Biology (4253)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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