Classification & Phylogeny

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What is classification in biology?

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The process of organizing living organisms into groups based on shared characteristics.

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Define phylogeny.

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The evolutionary history and relationships among species or groups of organisms.

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What are prokaryotic organisms?

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Unicellular organisms that lack a nucleus and membrane-bound organelles, such as bacteria.

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What are eukaryotic organisms?

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Organisms whose cells contain a nucleus and membrane-bound organelles, including plants, animals, and fungi.

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What is the difference between Archaebacteria and Eubacteria?

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Archaebacteria are prokaryotic organisms that often live in extreme environments, while Eubacteria are more common and found in a variety of environments.

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What is the significance of the endosymbiotic theory?

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It explains how eukaryotic cells evolved from prokaryotic cells through a symbiotic relationship.

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What are the main characteristics of the Animalia kingdom?

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Members are multicellular, heterotrophic, and lack cell walls.

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What is a unicellular organism?

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An organism that consists of a single cell, such as bacteria.

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What does heterotrophic mean?

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Organisms that cannot produce their own food and must consume other organisms for energy.

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What is the role of fungi in ecosystems?

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Fungi decompose organic material, recycling nutrients back into the ecosystem.