Select the suitable answer for filling the blanks.

1. The study of how organisms interact with each other and their environment, and of the abundance and distribution of organisms, is called.................

2. A................ is defined as all of the organisms belonging to the same species within an area at the same time.

3. All populations of a particular kind of organism form a ......................... .

4. A ....................consists of all of the various populations of different species interacting at a locale.

5. An ecosystem contains a community of populations and also
the ......................... environment.
6. The biosphere encompasses all of the terrestrial assemblages of organisms on earth, called..............., along with the marine and freshwater ecosystems.

• Spheres
• Biotic
• Biomes
• Species
• Ecology
• Common
• Community
• Territory
• Abiotic
• Ethology
• Litter
• Population