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Crustaceans loading

A group of primarily aquatic arthropods. Crustaceans exhibit branched appendages that other arthropods lack.

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Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
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  • Real World Application
    The Largest and Oldest Sperm

    The Largest and Oldest Sperm

    by CK-12 //advanced
    Learn about the small organisms that have the world's largest sperm and the discovery of fossilized giant sperm that is over 16 million years old.
    This indicates how strong in your memory this concept is
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