The wavelength of light absorbed by Pr form of phytochrome is :
Correct answer: A. 660 nm
- A. 660 nm
- B. 720 nm
- C. 620 nm
- D. 640 nm
Explanation
Phytochrome is the photoreceptor pigment that controls flowering. It has two forms as Pr and Pfr. Pr is bluish phytochrome and it absorbs light at 660 to 680 nm of wavelength. P fr is (far red) yellowish green and absorbs light at 730 nm of wavelength.
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Embryonic development covers fertilization, cleavage, formation of the blastula and gastrula, germ layers, organ formation and differentiation. Regeneration describes the replacement of lost tissues or body parts, whereas ageing involves gradual cellular and physiological changes linked to reduced repair, altered metabolism and declining organ function.
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