Cell Structure: Subcellular Components

AP Biology· difficulty 3/5

Many short cilia One long flagellum Both built from microtubule 9+2

Which statement BEST distinguishes typical cilia from flagella in eukaryotes?

  • A

    Cilia move only fluid; flagella never move cells

  • B

    Cilia have 9+2 microtubules; flagella have rotating filaments

  • C

    Cilia are short and numerous; flagella are long and few - though both share 9+2 microtubule architecture

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  • D

    Cilia exist only in plants; flagella only in animals

Explanation

Eukaryotic cilia and flagella both use a 9+2 microtubule axoneme; cilia are typically shorter and numerous, while flagella are longer and fewer per cell.

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