Ecology Quiz

What is an ecosystem?

• A group of organisms of the same species living in the same area

• A community of organisms interacting with each other and their physical environment

• A habitat with only plants and no animals

• A geological formation in a specific region

What is the purpose of using quadrats in ecological studies?

• To measure the temperature of the environment

• To count the number of different species within a defined area

• To determine the pH level of the soil

• To collect samples for DNA analysis

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

• Trees

• Soil bacteria

• Sunlight

• Rabbits

Biotic factors are non-living components of an ecosystem.

• True

• False

What is the role of decomposers in an ecosystem?

• They convert sunlight into energy for plants

• They break down dead organisms and organic matter, recycling nutrients back into the ecosystem

• They provide habitat for other organisms

• They regulate the population of predators

Which of the following is an example of a biotic factor in a forest ecosystem?

• Rainfall

• Temperature

• Oak trees

• Rocks

In a quadrat study, if you counted 10 daisies in a 1m² quadrat, what is the estimated population density per square meter?

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What is the primary source of energy for most ecosystems?

• Wind

• Water

• Sunlight

• Geothermal heat

Why is it important to study both abiotic and biotic factors in an ecosystem?

• Abiotic factors determine the types of organisms that can live in an ecosystem, while biotic factors determine the availability of resources.

• Abiotic factors only affect the physical environment, while biotic factors only affect the living organisms.

• Biotic factors determine the climate of an ecosystem, while abiotic factors determine the species diversity.

• Abiotic and biotic factors are unrelated and do not impact each other.

What is the term used to describe the total mass of living material at each trophic level in a food chain?

• Biomass

• Biodiversity

• Trophic level

• Primary productivity