Observe the food chain: Plant (1000 kj) → Goat → Lion (a) If autotrophs occupying the first trophic level are called producers, what are herbivores called as? (b) How much energy does the lion get in the above food chain?

What is reflex action? Explain the mechanism of reflex action with a suitable example.

Updated 1/17/2026

State the function of digestive enzymes.

Updated 1/17/2026

“The maximum concentration of harmful chemicals accumulates in human beings?” State the phenomenon involved and justify this statement.

Updated 1/17/2026

What is excretion? How do unicellular organisms remove their wastes?

Updated 1/17/2026

(a) What will happen to guard cells and the stomatal pore when water flows into guard cells. (b) How do plants transmit information from cell to cell?

Updated 1/17/2026