Question

Support the facts with reason that light is a major abiotic factors.

Answer 1

Light is a major abiotic factor because of the following reasons:

1. Light is important because autotrophs make food with the help of light (photosynthesis) and O${}_2$ is evolved during this process.
   
2. The small plants like herbs and shrubs can perform photosynthesis under very low light conditions as they are overshadowed by tall trees.
   
3. The plants depend on sunlight to meet their photoperiodic requirement for flowering.
   
4. For many animals, light is important in that they use the diurnal and seasonal variations in light intensity and duration (photoperiod) as cues for timing their foraging, reproductive and migratory activities.