Home PYQs UPPSC UPPSC MCQs Prelims 2015 (GS Paper I)

Question

Which of the following is a correct statement?

  1. Energy flow in the biospheric ecosystem is unidirectional.
  2. Energy flow in the biospheric ecosystem is cyclic.
  3. Relative loss of energy in natural ecosystem decreases with increasing trophic levels.
  4. Species at progressively higher tropic levels appear to be less efficient in using available energy.

Answer:

Option A: Energy flow in the biospheric ecosystem is unidirectional.

Detailed Solution:

The correct answer is “Energy flow in the biospheric ecosystem is unidirectional.”.

In an ecosystem, energy flow is unidirectional, meaning it primarily moves in one direction, from the sun to producers (plants and photosynthetic organisms) and then through various trophic levels.