SCIENCE SOL 4.3 ECOSYSTEMS

What is a niche?

• A type of habitat where organisms live.

• The function or role that an organism performs in the food web of a community.

• A classification of organisms based on their size.

• A method of reproduction in plants.

Why are decomposers important in an ecosystem?

• They produce energy through photosynthesis.

• They recycle nutrients back into the soil, making them available for plants and other organisms.

• They compete with plants for sunlight and water.

• They are the primary consumers in the food chain.

What are decomposers?

• Organisms that produce energy through photosynthesis.

• Organisms that break down dead or decaying organisms, returning nutrients to the soil.

• Organisms that consume living plants and animals.

• Organisms that filter water and purify it.

What is a population?

• A population is all the organisms of the same species that live in the same place at the same time.

• A population refers to a group of different species living together in an ecosystem.

• A population is the total number of individuals in a species across the globe.

• A population is a collection of organisms that are genetically identical.

What is biodiversity?

• Biodiversity refers to the variety of different species in a given area, contributing to ecosystem health.

• Biodiversity is the total number of organisms in a single species.

• Biodiversity is the process of creating new species through evolution.

• Biodiversity refers to the genetic variation within a single species.

Which of the following is NOT a nonliving factor of an ecosystem: sunlight, water, air, or grass?

• Sunlight

• Water

• Air

• Grass

How is energy passed from one organism to another in a community?

• Through the food web.

• By direct contact between organisms.

• Through chemical reactions only.

• By the process of photosynthesis.

What are producers?

• Organisms that consume other organisms for energy.

• Organisms that make their own food, usually through photosynthesis.

• Organisms that decompose dead matter.

• Organisms that rely on external sources for energy.

What is an ecosystem?

• An ecosystem is a community of living organisms interacting with their environment.

• An ecosystem is a system of interconnected computer networks.

• An ecosystem is an area where living and nonliving things interact to allow for the transfer of matter and energy.

• An ecosystem is a collection of stars and planets in space.

What is the difference between a habitat and a niche?

• A habitat is the role an organism plays in its environment, while a niche is the place where it lives.

• A habitat is the place where an organism lives, while a niche is the role it plays in that environment.

• A habitat is a type of organism, while a niche is a group of organisms.

• A habitat is the climate of an area, while a niche is the food source of an organism.