Biology Study Guide 1st Semester 2024

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What are producers in an ecosystem?

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Producers are organisms that provide most of the energy in ecosystems by converting sunlight into chemical energy through photosynthesis.

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What is population growth?

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Population growth is the increase in the number of individuals in a population over time.

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What is the third trophic level in an ecosystem?

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The third trophic level consists of secondary consumers, which are animals that eat herbivores.

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What is a chemical reaction?

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A chemical reaction is a process that changes one set of chemicals into a new set of chemicals.

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What is a heterotroph?

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A heterotroph is an organism that obtains its energy by consuming other organisms.

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What is the role of autotrophs in an ecosystem?

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Autotrophs are organisms that produce their own food, typically through photosynthesis, and serve as the primary energy source for other organisms.

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Define biotic factors in an ecosystem.

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Biotic factors are the living components of an ecosystem, such as plants, animals, and microorganisms.

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Define abiotic factors in an ecosystem.

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Abiotic factors are the non-living components of an ecosystem, including sunlight, water, temperature, and soil.

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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 through which nutrients and energy pass, while a food web is a complex network of interconnected food chains.

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What is biodiversity?

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Biodiversity refers to the variety of life in a particular habitat or ecosystem, including the number of different species.