Ecosystems

Ecosystem is created:
1. by the community of organisms together with the abiotic environment.
2. by the community of organisms.
3. by the abiotic environment.
Ecosystems are divided into
1. land and water.
2. stable and unstable.
3. water, land and stable.
Ecosystem is
1. basic structural functional unit of nature.
2. the basic unit of abiotic components .
3. the basic unit of biotic components.
The balance of the ecosystem is disturbed by :
1. changing abiotic or biotic components.
2. changing the temperature or pressure.
3. it cannot be disrupted.
Relationships between biotic components are created by:
1. organisms.
2. inanimate nature.
3. human.
Ecosystems are divided into:
1. natural and artificial.
2. current and historical.
3. natural.
In natural ecosystems life is dependent on:
1. only solar energy.
2. additional energy.
3. additional solar energy.
Artificial ecosystem is connected with
1. additional energy.
2. residual energy.
3. mechanical energy.
The balance of the ecosystem is most affected by:
1. human activities.
2. biotic components and the relationships between them.
3. abiotic components.
Embedded supplementary energy:
1. increases production.
2. is good for the landscape.
3. increases productivity.