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 the role of saliva in the digestion of food?

Updated 1/12/2026

Describe briefly four ways in which individuals with a particular trait may increase in population.

Updated 1/12/2026

Mention the common mode of reproduction found in • Amoeba • Planaria.

Updated 1/12/2026

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

Updated 1/12/2026

“Variations that confer an advantage to an individual organism only will survive in a population.” Justify.

Updated 1/12/2026