Question

Which of the following is/are correct regarding ecological succession?
$1$. Primary succession takes a very short time.
$2$. Secondary succession starts in an area where the soil is already present.
Select the correct answer using the codes given.

• A. $1$ only
• B. $2$ only
• C. Both $1$ and $2$
• D. Neither $1$ nor $2$

Answer 1

The correct option is B $2$ only

• Ecological succession is a process of directional change in vegetation on an ecological time scale. It is of two types: Primary and Secondary.
  
• Primary Succession - When a terrestrial site is first colonised by the pioneer species. It takes a very long time For Eg. Lichens and Mosses.
  
• Secondary Succession - It occurs on preexisting soil whereas primary succession usually occurs in a place lacking soil. After Climax (destruction of an existing site by natural event – droughts, floods, storms or by human intervention. for eg. – deforestation, agriculture, overgrazing) the sequential development of biotic communities.