Whale is

Which of the following is a primary consumer in a maize field ecosystem?

Choose the correct sequence of True $(T)$ and False $(F)$ statements:
$(1)$ Zooplanktons are primary producers in an aquatic ecosystem.
$(2)$ Decomposition is largely an oxygen-requiring process.
$(3)$ In a natural ecosystem, fishes, wolf, etc., are carnivores.
$(4)$ The amount of energy decreases at each successive trophic level.

Grassland biome for its maintenance requires

Which of the following animals occupies more than one trophic level in the same ecosystem at the same time?

Which light is transmitted by water?