Given below are two statements Statement I: The primary source of energy in anecosystem is solar energy.Statement II: The rate of production of organicmatter during photosynthesis in an ecosystem iscalled net primary productivity (NPP).In the light of the above statements, choose themost appropriate answer from the options given below
Answer
🧠Concept Clarification:
✅ Statement I is Correct:
The sun provides the initial source of energy for most ecosystems. Producers (like plants and algae) convert solar energy into chemical energy via photosynthesis. This energy then flows through the food chain.
✅ Statement II is Correct:
Net Primary Productivity (NPP) refers to the rate at which organic matter is produced and stored in plants after accounting for respiration losses.
Formula: NPP = GPP – Respiration
While the statement simplifies the definition, it is widely accepted in academic contexts.
✅ Final Answer:
📘 Summary:
| Statement | Evaluation | Explanation |
|---|---|---|
| Statement I | Correct | Solar energy is the main energy input to ecosystems. |
| Statement II | Correct | NPP is the energy available to consumers after plant respiration. |