Basic ecological concepts

Ecology as a science develops
1. in the 20th century.
2. since the 19th century.
3. together with the natural sciences.
Ecology is the science that studies
1. relations between the environment and the organisms and relations among other organisms.
2. relations between organisms.
3. the environmental protection.
A biotop is
1. a place that provides living conditions for all organisms.
2. a group of organisms of the same species.
3. a climate suitable for the development of organisms.
A population is
1. a set of individuals of the same species living in a certain place at a certain time.
2. a set of all the organisms living in a particular place at a certain time.
3. a set of all individuals who live at a given place.
Synecology studies
1. communities and ecosystems.
2. cyanobacterium.
3. different types of organisms.
A community is
1. a set of individuals of different species at a given location at a given time.
2. a set of individuals of the same kind at a given location at a certain time.
3. a set of individuals of different species at a certain time.
Biocenosis is
1. a community.
2. a location.
3. a population.
A biome is
1. a set of similar ecosystems.
2. a set of all ecosystems on Earth
3. a place that provides living conditions for all organisms.
Demecology studies
1. populations.
2. different types of organisms.
3. communities and ecosystems.
The ecosystem is
1. a set of organisms and their environment.
2. a set of the environments and organisms in them.
3. a set of conditions of life.