STAAR Biology Reporting Category 3

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What are protists?

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Protists are a diverse group of eukaryotic microorganisms, which can be unicellular or multicellular, and share characteristics with both plants and animals.

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What are homologous structures?

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Homologous structures are anatomical features in different species that share a common ancestry, even if they have different functions.

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What are vestigial structures?

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Vestigial structures are body parts that have lost their original function through evolution, such as the wings of ostriches.

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What is natural selection?

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Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring.

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What is the significance of amino acid sequences in determining relatedness among organisms?

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Amino acid sequences can reveal evolutionary relationships; organisms with similar sequences are likely to be more closely related.

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What is the difference between species and genus?

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Species is the basic unit of classification, representing a group of individuals that can interbreed, while genus is a higher taxonomic category that includes one or more species.

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What is a phylum in biological classification?

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A phylum is a level of classification that groups together organisms that share a basic structural framework.

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What is adaptation in biology?

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Adaptation refers to the process by which a species becomes better suited to its environment through evolutionary changes.

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What is predation?

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Predation is a biological interaction where one organism (the predator) hunts and consumes another organism (the prey).

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What is the role of cilia in protists?

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Cilia are tiny hair-like structures that help protists move and feed by creating water currents.