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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Oxygen is released in the process of

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

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

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

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

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

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

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

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

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

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