Identify the given food chain:
Grass $\rightarrow$ Grasshopper $\rightarrow$ Birds $\rightarrow$ Lion

Identify the mismatched event from the following structures.

Read the following statements carefully and answer the question:
$(1)$ Pyramids of number and biomass can be upright or inverted in an ecosystem.
$(2)$ Phosphorus and sulfur are sedimentary cycles.
$(3)$ The largest reservoir of carbon on Earth is found in the oceans.
$(4)$ The structural and functional unit of ecology is the ecosystem.
Which of the above statements are correct?

The first plants to reappear in a badly burned forest area will most probably be

If less light falls on the pond's surface,what is the most likely consequence for the fish population?

Which of the following statements is true for an ecosystem?