Short Answer TypeApart from being a part of the food chain, predators play other important roles. Mention any two such roles supported by examples.
How are productivity, gross productivity, net primary productivity and secondary productivity interrelated?
Long Answer TypeShort Answer TypeLong Answer TypeExplain the carbon cycle with the help of a simplified model.
Key process involved in carbon cycle is photosynthesis and respiration.
Carbon cycling occurs through atmosphere, ocean and through living and dead organisms.
1. Carbon is fixed during photosynthesis by the plants.
2. A large amount of carbon is returned to the atmosphere as CO2 by the respiratory activities of organisms.
3. Decomposers also contribute substantially to the CO2 by acting on waste materials and dead organic matters.
4. Some of the fixed carbon is lost to the sediments and removed from the circulation.
5. Burning of fossil fuels forest fire and combustion of organic matter volcanic activity also release CO2 in the atmosphere.
Explain how does:
(a) a primary succession start on a bare rock and reach a climax community?
(b) the algal bloom eventually choke the water body in an industrial area?(a) Explain primary productivity and the factors that influence it.
(b) Describe how do oxygen and chemical composition of detritus control decomposition?
Short Answer TypeWith the help of a flow chart, show the phenomenon of biomagnification of DDT in an aquatic food chain.
Switch
