· Imagine that the producers in an ecosystem are extensively destroyed. How does it affect the proportion of the biomass between different trophic levels? Explain briefly.
· The following food chain may diagrammatically be represented as various levels of energy flow. Record the amount of available energy, utilized and transferred energy from one trophic level to another. Grass → Rabbit → Snake → Eagle
· Using the organism mentioned below prepare a pyramid of energy, a pyramid of biomass and a pyramid of numbers. Rice→ Rat → Owl → Vulture
· Both the pyramid of energy and biomass pyramid are almost identical with each other in the composition and stratification. Assess this statement and rectify, if there is any mistake.
· Firewood is burnt. Draw the schematic representation of Carbon cycle based on this process.
· Man still exploits natural resources indiscriminately. If the process continues, the ultimate results will be more tragic and dangerous. So everyone should take a pledge that at least for a short period we do not utilize natural resources. Evaluate this statement and record your opinion.
· The nitrogen content of soil is drastically depleting at a specific locality. What will be the cause of this event? Formulate any four suggestions.