Question

During ecological succession

• A. the changes lead to a community that is in near equilibrium with the environment and is called pioneer community
• B. the gradual and predictable change in species composition occurs in a given area
• C. the establishment of a new biotic community is very fast in its primary succession
• D. the numbers and types of animals remain constant

Answer 1

The correct option is B the gradual and predictable change in species composition occurs in a given area

The gradual and fairly predictable change in the species composition of a given area is called ecological succession. During succession, some species colonise an area and their populations become more numerous, whereas populations of other species decline and even disappear. So the right answer is the gradual and predictable change in species composition occurs in a given area.

The species that invade a bare area are called pioneer species. In the primary succession, the establishment of a new biotic community is very slow. The numbers and types of animals keep changing in an ecological succession.