In a pond ecosystem, benthos means
Primary consumers in the depth of a pond
Virus
Zooplankton on the water surface
Bacteria
In the phosphorus cycle, phosphate becomes available by weathering of rocks first to
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
Food chain is a series of population, which starts with producers. It is concerning with
Secondary producers are
Driving force of an ecosystem is