Which one of the following components of ecosystem comes from outside
Oxygen
Temperature
Insects
Energy
Energy enters into the ecosystem through
Assertion : In a food chain, members of successive higher levels are fewer in number.
Reason : Number of organisms at any trophic level depends upon the availability of organisms which serve as food at the lower level.
Choose correct sentence.
Fill in the trophic levels $(1, 2, 3$ and $4)$ in the boxes provided in the figure.
The green plants in an ecosystem which can trap solar energy to convert it into chemical bond energy are called