Select the incorrect statement from the following.

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All the colour components of the visible spectrum are available for marine plants living at different depths of the ocean.

Many plants are also dependent on sunlight to meet their photoperiodic requirement for flowering.

The availability of light on land is closely linked with that of temperature since the sun is the source for both.

For many animals diurnal and seasonal variations in light intensity and duration act as cues for timing their foraging, reproductive and migratory activities.

answer is A.

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Detailed Solution

Not all the colour components of the visible spectrum are available for marine plants living at different depths of the ocean. Blue light being made of short wave radiations can reach the deepest. Red light has poor penetrability. In sea, the green algae remain near the surface, brown algae in intermediate depths while red algae flourish the deepest in the photic zone. Since they can absorb blue light, red algae can live in much deeper water where light of long wavelengths (e.g. red) can’t reach.

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