Question

Ecotone is
A. Transitional area between two communities/ecosystem
B. Interaction between two population
C. Development of ecads
D . Development of ecotypes

Answer 1

Hint: An ecosystem is the basic unit of the field of the scientific study of nature. According to this discipline, an ecosystem is a physically defined environment.

Complete Answer:
Let us find the correct answer,
Option A: Ecotone can be defined as a transitional area of vegetation which is present between two different plant communities, like for example between forest and grassland. It may be present as a broad belt or can be found in a small pocket (forest clearing). Therefore, this is the correct option.
The influence of the two bordering communities on each other is termed as edge effect. And it is to be noted that, an ecotone has a higher density of species than the either flanking communities.

Option B: Interaction between two populations is termed as population interaction. There are different kinds of population interactions - competition, camouflage, symbiosis, predation, etc. Therefore, this is the incorrect option.

Option C: Development of ecads means growth of an organism which is modified by its environment. Therefore, this is the incorrect option.

Option D: Development of ecotype means growth of a plant or an animal species which occupies a particular habitat. These animals or plants in other words are adapted to the local environment conditions. Therefore, this is the incorrect option.

Thus, the correct option is A) Transitional area between two communities/ ecosystem.

Note: The characteristics of ecotone is as follows,
- They can be identified by the distinct change in both soil composition and gradient between the two communities.
- They are more distinct.
- They have low species richness.
- They can be man made or natural.