arrow
arrow
arrow
All ecosystems begin with energy input from-
Question

All ecosystems begin with energy input from-

A.

Water

B.

Firewood

C.

Air

D.

Sun

Correct option is D

The energy input for all ecosystems originates from the Sun. Solar energy drives photosynthesis in plants, which is the foundational process that supports all life in an ecosystem. Through photosynthesis, plants convert sunlight into chemical energy stored in glucose, which is then passed through the food chain as different organisms consume plants and each other. Thus, the Sun is the primary source of energy for nearly all ecosystems on Earth.

test-prime-package

Access ‘RRB JE Mechanical Engineering’ Mock Tests with

  • 60000+ Mocks and Previous Year Papers
  • Unlimited Re-Attempts
  • Personalised Report Card
  • 500% Refund on Final Selection
  • Largest Community
students-icon
368k+ students have already unlocked exclusive benefits with Test Prime!
test-prime-package

Access ‘RRB JE Mechanical Engineering’ Mock Tests with

  • 60000+ Mocks and Previous Year Papers
  • Unlimited Re-Attempts
  • Personalised Report Card
  • 500% Refund on Final Selection
  • Largest Community
students-icon
368k+ students have already unlocked exclusive benefits with Test Prime!
Our Plans
Monthsup-arrow