Which of the following are the essential sources for releasing in the atmosphere?
$I.$ Burning of wood
$II.$ Volcanic activity
$III.$ Combustion of organic matter
$IV.$ Fossil fuels
Choose the correct option
$I, II \;and\; III$
$II, III \;and \;IV$
$I, III\; and\; IV$
$I, II, III\; and\; IV$
Identify the correct type of food chain.
Dead animal $\rightarrow$ Blow flymaggots $\rightarrow$ Common frog $\rightarrow$ Snake
Distinguish between
$(a)$ Grazing food chain and detritus food chain
$(b)$ Production and decomposition
Definitions / Explanation :
$(i)$ Saprotrophs
$(ii)$ Trophic level
If bamboo plant is growing in a far forest then what will be its trophic level
The zooplanktonic forms are