Biology Unit 3 Ecology Test 2024-2025

What are the living factors in an ecosystem

• Non-living factors
• Inorganic factors
• Biotic factors
• Abiotic factors

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What are the nonliving factors in an ecosystem?

• Abiotic factors
• Ecosystem factors
• Living organisms
• Biotic factors

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Biotic and abiotic factors can ​ (a)   one another and they both play important roles in the ​ (b)   of the ​ (c)  

• influence
• health
• ecosystem
• hurt

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The variety of living organisms in an ecosystem

• environmental variation
• biodiversity
• species variety
• ecosystem diversity

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Organisms that have major impacts on the ecosystem they live in

• Primary consumers
• Keystone species
• Decomposers
• Invasive species

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Keystone species help ​ (a)   biodiversity and directly affect the ​ (b)   that they live in. When they are removed biodiversity ​ (c)  

• improve
• ecosystem
• decreases

Autotrophs are ​ (a)   that obtain ​ (b)   from sunlight or chemicals.

• producers
• energy
• consumers

Autotrophs use ​ photosynthesis and ​ (a)   to obtain their ​ (b)  

• chemosynthesis
• energy

Consumers are also called ​ (a)   because they obtain ​ (b)   by eating other living or nonliving resources.

• heterotrophs
• energy

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Classify the organism as heterotroph or autotroph

Groups:

(a) Heterotroph

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(b) Autotroph

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