BotanyWhy rhodophyceae members exhibit red colour ?

Why rhodophyceae members exhibit red colour ?

  1. A

    Since most rhodophyta grow at great depths, the chlorophyll can only absorb light in the red area of the spectrum.

  2. B

    They absorb mostly blue light and loss some of the light energy as red light.

  3. C

    Red pigment of rhodophyta absorbs all the light waves.

  4. D

    The light reaching the greatest depth in water is in the blue-green region of the spectrum, is absorbed by phycoerythrin.

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    Solution:

    Rhodophyta are commonly called as red algae because of the predominance of the red pigment (r – phycoerythrin) in their body. They occur in both well lighted regions close to the surface of water and also at great depths in ocean where relatively little light penetrates. They exhibit a red colour because the wavelengths of light that are absorbed by chlorophyll are blue light absorbed by phycoerythrin and it looses some of the energy as red light.

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