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Organisms and Populations — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYOrganisms and Populations4 Marks
Question
How is sunlight important for every ecosystem ?
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Answer

  1. Sunlight is essential for the plants for photosynthesis.
  2. It is the only source of energy for the entire ecosystem.
  3. Without sunlight the food chains will not exist.
  4. Survival of plants is therefore dependent on sunlight.
  5. In case of animals diurnal and seasonal variations in light intensity and duration decide the feeding, foraging and reproductive activities.
  6. Migrations shown by certain animals also depend on light.
  7. Almost all animals have behaviour based on photoperiod. The proportion of sunlight on land also decides the ambient temperature. Thus, life is dependent on light.

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