Unit 3 Biology

What does an ecosystem comprise of?

• Only forests

• Only water bodies

• Varied habitats from microhabitat to ecoregion

• Only living organisms

What factors play a crucial role in shaping ecosystems?

• Only soil type

• Biotic and abiotic factors

• Only precipitation

• Only temperature

What does biodiversity include?

• Only the diversity of species

• Only the number of animals

• Only the diversity of ecosystems

• The diversity of species and ecosystems

What is the smallest scale of habitat within an ecosystem?

• Biome

• Ecoregion

• Biosphere

• Microhabitat

Which of the following is an abiotic factor?

• Insects

• Water

• Animals

• Plants

Which level of biodiversity is concerned with the variety of ecosystems within a region?

• Genetic diversity

• Species diversity

• Ecosystem diversity

• Community diversity

What type of biome is characterized by low rainfall and sparse vegetation?

• Tropical rainforest

• Temperate forest

• Desert

• Tundra

Which of the following best describes the role of decomposers in an ecosystem?

• They produce oxygen through photosynthesis

• They consume living plants and animals

• They break down dead material and recycle nutrients

• They pollinate flowering plants

How do producers contribute to an ecosystem?

• By consuming other organisms

• By decomposing dead organisms

• By converting sunlight into chemical energy through photosynthesis

• By pollinating plants

Which of the following is a characteristic feature of a wetland ecosystem?

• Low biodiversity

• Permanent ice cover

• High salinity

• Water saturation in the soil