CHAPTER-3

Succession which begins on a new habitat is called:

• Primary

• Secondary

• Autogenic

• Allogenic

Succession starting from a water body is:

• Hydrosere

• Psmmaosere

• Lithosere

• Halosere

Climax community is:

• The last stable community

• First stable community

• Unstable that develops in the beginning of succession

• Unstable

A food web consists of:

• A portion of a food chain

•  Producers, consumers and decomposers

• Interlocking food chains

• A set of similar consumers

If all the Plants vanish, animals will die due to non availability of:

• Oxygen

• Food

• Shelter

• Shade

1. The regeneration of a dense community from the remnant of an earlier destroyed community is:

• Community

•  Primary Succession

• Secondary Succession

• Deforestation

_____ help in maintaining CO2-O2 balance of the atmosphere.

• Herbivores

• Carnivores

• Producers

• Decomposers

The flow of energy is ___ reversed in an ecosystem.

• Always

• Never

• Sometimes

• None of these

Ecological pyramids do not take into consideration _____ in the graphic representation.

• Producers

• Herbivores

• Carnivores

• Decomposers

Flow of energy in an ecosystem:

• Bidirectional

•  Scattered

• Unidirectional

• Multidirection