Practicing Success

Target Exam

CUET

Subject

Biology

Chapter

Ecosystem

Question:

Select the correct sequence of development of following stages in a primary succession

(A) Scrub stage 

(B) Marsh -meadow stage 

(C) submerged free floating plant stage

(D) Reed -swamp stage

(E) Submerged plant stage 

Choose the correct answer from the options given below ;

Options:

C,E,B,D,A

E,C,D,B,A 

D,E,B,C,A 

E,C,D,A,B

Correct Answer:

E,C,D,B,A 

Explanation:

The correct answer is Option (2)- E,C,D,B,A

Succession is a process that starts in an area where no living organisms are there – these could be areas where no living organisms ever existed, say bare rock; or in areas that somehow, lost all the living organisms that existed there. The former is called primary succession, while the latter is termed secondary succession.

In primary succession in water, the pioneers are the small phytoplanktons,which are replaced with time by rooted-submerged plants, rooted-floating angiosperms followed by free-floating plants, then reedswamp, marsh-meadow, scrub and finally the The climax again would be a forest. With time the water body is converted into land.