Question

What is true about any ecosystem?

• A. It is self regulatory
• B. It is self sustained
• C. Top carnivores have climax trophic level position
• D. All of the above

Answer 1

The correct option is D All of the above

• Ecosystems are said to be self-regulating or self-sustained in that each contains feedback mechanisms, which function to maintain the components of the system in one or other of its equilibrium states.
• An equilibrium state demonstrates the stability of ecosystems. Even in these stable states, the components of ecosystems are in dynamic exchanges, and these exchanges involve the build-up of energy or materials, which cycle the ecosystem either within a single equilibrium or between various equilibrium states.
• It is the adaptive capacity of ecosystems, that have provided both the stability and the enormous range of diversity on earth.
• Food chains start at trophic level 1 with primary producers such as plants, moved to herbivores at level 2, predators at level 3 and finish with carnivores or apex predators at level 4 or 5.
  Thus, the correct answer is option D.