Trophic Levels - Multiple Choice Questions

What is a trophic level?

• A measure of an organism's age

• A classification of an organism's feeding position in a food chain or web

• A term describing the habitat of an organism

• A unit of energy measurement in ecosystems

Which organisms occupy the first trophic level in a food chain?

• A) Primary consumers

• B) Secondary consumers

• C) Producers

• D) Decomposers

Why are there generally no more than four trophic levels in a food chain?

• Limited energy is available at higher trophic levels

• Lack of space in ecosystems

• Insufficient number of species

• Environmental regulations

What term describes organisms that consume primary consumers?

• Primary producers

• Secondary consumers

• Tertiary consumers

• Decomposers

In a food web, which organisms are typically found at the highest trophic level?

(a)  

What role do decomposers play in an ecosystem?

• They produce energy through photosynthesis

• They consume primary producers

• They break down dead organisms, recycling nutrients

• They occupy the highest trophic level

Which of the following is an example of a primary consumer?

• Grass

• Rabbit

• Wolf

• Mushroom

How much energy is typically transferred from one trophic level to the next?

• 1%

• 10%

• 50%

• 90%

What is the primary source of energy for producers in most ecosystems?

• Chemical compounds

• Sunlight

• Heat from the Earth's core

• Decomposed organic matter

Which of the following best describes an omnivore?

• An organism that eats only plants

• An organism that eats only animals

• An organism that eats both plants and animals

• An organism that decomposes organic material