18-09-2014, 01:55 PM
Anna University , ChennaiDepartment of B.E-Computer Science and Engg
- Common to I.T Department and EEE,ECE Department
1. Define Ecosystem.
Ecosystem has been defined as a system of interaction of organisms with their surroundings. Numerous dynamic interactions are occurring within an ecosystem and these are complex. Always alterations to the biotic and Abiotic components are happening within the ecosystems.
2. Enumerate some characteristics of an Ecosystem.
Ecosystem is the major ecological unit.
It contains both biotic and abiotic components.
Through the biotic and abiotic components nutrient cycle and energy flow occur.
The boundary of the ecosystem is not rigidly defined and it is flexible.
The function of ecosystem is related to the cycling of materials and flow of energy.
3. Classify the Ecosystem.
The ecosystem can be generally classified into three types.
4. What are the functional components of ecosystem?
Biotic and Abiotic are the components of eco system
5. Define heterotrophs.
Those organisms which depend on others (Producers-Autotrophs) for their energy requirements are known as Consumers or Heterotrophs.
6. Name the types of consumers.
1.Herbivores (or) Primary Consumers; 2. Carnivores (or) Secondary Consumers 3.Omnivores (or) Tertiary Consumers
7. Define Food chain and Food web.
A food chain is a picture or model that shows the flow of energy from Autotrophs to a series of organisms in an environment. The energy that it flows can be different for each food chain. The relationships between the components of the food chain are very complex. The network like interaction of organisms is called as food web.
8. What are Decomposers?
The organisms which breakdown the complex compounds into simple products are called as decomposers or reducers.
9. What are the factors to be considered in Abiotic eco system?
Climatic factors, Physical factors and Chemical factors.
10. Define biogeochemical cycle.
Two types of biogeochemical cycles are 1. Gaseous Cycle (Eg. N2 and O2 cycles);
2. Sedimentry Cycle ( Sulphur and Phosphorus cycles)
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