Question

The introduction of new life forms in a denuded habitat is initiated by the process of :
1. Ecesis
2. Aggregation
3. Migration
4. Coactions

Answer 1

Correct Answer - Option 3 : Migration

The correct answer is Migration.

• New lifeless bare areas are also created by man, for example, walls, stone quarrying, burning, digging, flooding large land areas under reservoirs, etc.
• The seeds, spores, or other propagules of the species reach the bare area through the agency of air, water, or animals.
• The process starting from the time a propagule leaves the parent plant to the time it arrives in the bare area is called migration.

Ecesis	The ability of some migrating plant species, having arrived at a new site, to germinate, grow, and reproduce successfully, while others fail to become established in the new environment. The establishment of organisms at the location.
Aggregation	In this final stage of invasion, the successful immigrant individuals of a species increase their number by reproduction and aggregate in a large population in the area, and in consequence individuals of the species come close to each other.
Coactions	The interactions, particularly competition, among the organisms. Individuals of a species affect each other's life in various ways this is called Coaction.