Bio final exam review

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What is a decomposer?

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A decomposer is an organism that breaks down dead or decaying organic material, returning nutrients to the soil. Examples include bacteria and fungi.

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What is a producer?

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A producer is an organism that can make its own food through photosynthesis or chemosynthesis. Examples include plants like pine trees and bamboo.

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What is a consumer?

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A consumer is an organism that cannot produce its own food and instead obtains nutrients by eating other organisms. Examples include animals.

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What is antibiotic resistance?

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Antibiotic resistance occurs when bacteria evolve and become resistant to the effects of medications that once killed them or inhibited their growth.

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What is an independent variable in an experiment?

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The independent variable is the factor that is changed or controlled in a scientific experiment to test its effects on the dependent variable.

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What is the role of bacteria in the ecosystem?

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Bacteria play a crucial role in ecosystems as decomposers, breaking down organic matter and recycling nutrients.

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What is photosynthesis?

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Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll.

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What is the difference between a food chain and a food web?

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A food chain is a linear sequence of organisms where each is eaten by the next, while a food web is a complex network of interconnected food chains.

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What are the three main types of ecological pyramids?

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The three main types of ecological pyramids are pyramid of numbers, pyramid of biomass, and pyramid of energy.

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What is the significance of biodiversity?

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Biodiversity is important for ecosystem resilience, providing a wider variety of resources and services, and maintaining ecological balance.