7.2.1 Levels of Organization

• What is an ecosystem composed of?

  Biotic and abiotic factors
• Biotic factors compete for resources
• An ecosystem includes only living organisms.

  False
• A population shares resources
• What is the key difference between a community and an ecosystem?

  Abiotic factors
• Why are the levels of organization in an ecosystem crucial?

  Maintaining balance and sustainability
• An ecosystem consists of biotic factors and abiotic factors.
• What are examples of biotic factors in an ecosystem?

  Plants, animals, bacteria, fungi
• A community includes all the different species in an ecosystem.


  True
• A biome is a large geographical area with similar climate, vegetation, and animal life.
• What is an example of a population in a meadow?

  A group of daisies
• What can the loss of a key prey species in a community disrupt?

  Ecosystem dynamics
• An ecosystem in a grassland includes soil, sunlight, water, and the various living species.
• Abiotic factors include living organisms such as plants and animals.

  False
• Match the level of organization with its correct definition:

  Individual ↔️ A single organism

  Population ↔️ Group of the same species

  Community ↔️ All species in an area

  Ecosystem ↔️ Biotic and abiotic interactions

  Biome ↔️ Large geographical area
• What is a biome?

  Large geographical area
• A temperate grassland is an example of a biome.


  True
• Match the level of organization with its interactions:

  Individual ↔️ Participates in predation

  Population ↔️ Competes for resources

  Community ↔️ Affects nutrient cycling

  Ecosystem ↔️ Maintains biotic balance
• The health of each level in an ecosystem is independent of others.

  False
• How do trees in a forest depend on abiotic factors?

  Sunlight, water, and soil
• Arrange the levels of organization in an ecosystem from simplest to most complex.

  1️⃣ Individual

  2️⃣ Population

  3️⃣ Community

  4️⃣ Ecosystem

  5️⃣ Biome
• What does an ecosystem incorporate besides living organisms?

  Non-living environment
• Match the level of organization with its key characteristic:

  Individual ↔️ Each organism is unique

  Population ↔️ Interacts within a specific area

  Community ↔️ Includes different species

  Ecosystem ↔️ Balances biotic and abiotic factors
• A grassland is an example of a biome.


  True
• What is a temperate grassland called in North America?

  The Great Plains