Ecosystem strucuture

What term describes all living organisms in an ecosystem?

• Biotic factors

• Abiotic factors

• Trophic levels

• Decomposers

Which level of an ecosystem's food chain includes plants and other autotrophic organisms?

• Primary consumers

• Secondary consumers

• Producers

• Tertiary consumers

Which of the following is an example of an abiotic component in an ecosystem?

• Deer

• Grass

• Water

• Insects

Which trophic level includes organisms that primarily feed on plants and are herbivores?

• Primary consumers

• Secondary consumers

• Tertiary consumers

• Producers

What are organisms that break down dead organic matter and recycle nutrients in ecosystem called?

• Producers

• Consumers

• Decomposers

• Predators

What is the ultimate source of energy for most ecosystem?

• Plants

• Animals

• Sunlight

• Fungi

Which term describes the interconnected network of food chains within an ecosystem?

• Biodiversity

• Food chain

• Food web

• Trophic pyramid

Which organisms are at the highest trophic level in most ecosystem?

• Producers

• Primary consumers

• Secondary consumers

• Tertiary consumers

What term is used to describe the process by which carbon is exchanged between living organisms and their environment?

• Carbon fixation

• Photosynthesis

• Carbon cycle

• Nitrogen fixation

In a food chain, which trophic level usually has the least energy available?

• Producers

• Primary consumers

• Secondary consumers

• Tertiary consumers