Conversion of nitrogen compounds into gaseous nitrogen is called........ .

Conversion of ammonia into a nitrite and then nitrate is called..........

Find the odd man out: Photosynthesis, combustion, decomposition, corrosion.

Ecological Pyramid is called............

Microbes which do not need oxygen are called...........

Oxygen forms ......... of the atmosphere.

Carbon atoms are circulated and recycled through ............ .

Most organisms cannot use the free form of ................. .

Fungi and other microbes are called..........

The Indian Institute of Ecology and Environment, Delhi, has published........... .

Find the odd man out: Photosynthesis, Nitrification, Ammonification, Denitrification.

Flow of energy in an ecosystem is............ .

............is an important component of proteins and nucleic acids.

.......... is a secondary consumer.

Find the odd man out: Frog, Owl, Squirrel, Fox

Find the odd man out: Grasshopper, squirrel, elephant, lion

Find the odd man out: Burning of fossil fuels, forest fire, respiration, volcanic activity.

Tiger is a /an.......... .

.................. irst proposed the concept of Ecological Pyramid in 1927.

Plants convert carbon dioxide into .......... by the process of photosynthesis.

Amount of matter and energy .............. from the lowest level to the highest level.

............ is the most important source of energy in any ecosystem.

..........is a primary consumer.

Find the odd man out: Nitrogen cycle, oxygen cycle, carbon cycle, phosphorus cycle.

............. cycle is a gaseous cycle

An intricate network of food chains is called...............

Carbon dioxide is released into the atmosphere through ............. .

The pattern of energy exchange in an ecosystem is called a ............... .

............. is a sedimentary cycle.

Oxygen is released in the process of