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(a) Comment on the pattern in which all ...

(a) Comment on the pattern in which all communities undergo a change in composition and structure with changing environmental conditions.
(b) Explain 'Climax community' and 'sere'.
Differentiate between primary and secondary succession with examples.

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(a) This change is orderly and sequential parallel with the changes in the physical environment. The gradual and fairly predictable change in the species composition of a given are is called ecological succession.
(b) Climax community : Changes lead a community that is in a near equilibrium with the environment and that is a climax community
'sere' : The entire sequence of communities that successively change in a given area.
(c)
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How many statement are correct regarding all succession :- (i) composition & structure of communities constantly change with the changing environmental conditions. (ii) The change is orderly & sequential, parallel with the change in the physical environment (iii) Change leads finally to a community is unstable .

Assertion: Climax community is in near equilibrium with the environment Reason: Composition and structure of climax community generally slow change with changing environment

Plant succession is the gradual predictable change in species composition of an area. It starts with pioneer community which leads to stable climax community which results in a……….condition.

During differentiation cells undergo few to major structural changes both in their (A)____ and (B)_____

Pick out the correct option from (a) to (e). A. Primary succession begins in areas where natural communities have been destroyed. B. Hydrarch succession takes place in water. C. The climax community is the community that is in near equilibrium with the immediate environment. D. In newly cooled lava secondary succession occurs.

The gradual and predictable change in the species composition of a given area is called ecological succession . What you understand with the pioneer and community in this context ?

[A] : Every biological system resists a change and wants to remain in a state of equilibrium . [R] : Climax communities of an ecosystem are produced after several changes it has gone through succession .

XII BOARDS PREVIOUS YEAR-XII BOARDS-COMPTT
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