Question

Identify the wrong pair of statements
I.During plant succession some species colonise an area and populations becomes more numerous whereas populations of other species decline and even disappear
II.Both hydrarch and xerarch successions lead to mesic conditions
III. Secondary succession is a slow process as compared to primary succession
IV.In successive seral stages there is no change in the diversity of species of organisms

• A. II , III
• B. I , II
• C. III , IV
• D. I , III

Answer 1

The correct option is C III , IV

Secondary succession usually occurs faster than primary succession due to the presence of the substrate.

In the successive seral stages, there occurs a change in diversity, increase in a number of species, and an increase in total biomass.

So, option III and IV are wrong statements.

So the correct option is C.