Ecology and Ecosystems

Which of the following is a biotic factor in an ecosystem? A) Sunlight B) Temperature C) Plants D) Water.

• Sunlight

• Temperature

• Plants

• Water

Answer explanation

Plants are biotic factors as they are living organisms that interact with other living and non-living components in an ecosystem. Sunlight, temperature, and water are abiotic factors, as they are non-living elements.

What term describes a group of ecosystems that share similar climates and organisms?

• Habitat

• Biome

• Community

• Population

Answer explanation

A biome is a large area characterized by its climate, soil, plants, and animals. It encompasses multiple ecosystems that share these features, making 'biome' the correct term for a group of similar ecosystems.

Fill in the blank: The variety of life in the world or in a particular habitat or ecosystem is called ____.

• Biodiversity

• Biomass

• Biome

• Biosphere

Answer explanation

The correct answer is 'Biodiversity', which refers to the variety of life in a particular habitat or ecosystem. Other options like biomass, biome, and biosphere relate to different ecological concepts.

What is the primary source of energy for most ecosystems?

• Wind

• Water

• Sunlight

• Soil

Answer explanation

The primary source of energy for most ecosystems is sunlight. It drives photosynthesis in plants, which form the base of the food chain, supporting all other life forms in the ecosystem.

Which of the following is a biotic factor?

• Humans

• Temperature

• Soil

• Sunlight

Answer explanation

Humans are living organisms and thus represent a biotic factor in an ecosystem. In contrast, temperature, soil, and sunlight are abiotic factors, as they are non-living components that influence the environment.

Which of the following is a biotic factor?

• Parasites

• Soil

• Temperature

• Air

Answer explanation

Parasites are living organisms that depend on other living hosts for survival, making them a biotic factor. In contrast, soil, temperature, and air are abiotic factors, as they are non-living components of the environment.

A _________ includes several ecosystems that share a similar climate and communities.

• a) biosphere

• b) community

• c) biome

• d) ecosystem

Answer explanation

A biome is a large area characterized by specific climate conditions and communities of plants and animals. It encompasses multiple ecosystems that share these similarities, making 'c) biome' the correct answer.

Which level of organization includes all living organisms on Earth?

• biosphere

• community

• population

• ecosystem

Answer explanation

The biosphere is the highest level of organization and encompasses all living organisms on Earth, including their interactions with the environment. Other options like community, population, and ecosystem are smaller components within the biosphere.

What is the term for different species living together in a particular area?

• biosphere

• community

• population

• ecosystem

Answer explanation

The term 'community' refers to different species living together in a specific area, interacting with one another. In contrast, 'population' refers to individuals of the same species, while 'ecosystem' includes both living and non-living components.

What is the term for a large area characterized by its climate and communities?

• biosphere

• community

• biome

• ecosystem

Answer explanation

A biome is a large area defined by its climate and the communities of plants and animals that inhabit it. This term encompasses various ecosystems that share similar environmental conditions.