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  • A picture is worth a thousand words
    Browse over 40,000 high quality diagrams, illustrations, and photos. Use them in your presentations or lectures. You can also upload your own images here.
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  • Featured: Bladderwrack (Fucus vesiculosus)
    Bladderwrack (Fucus vesiculosus)

    This brown alga, commonly known as seawrack, lives along rocky North Atlantic coasts. It is harvested for use as an iodine-rich nutritional supplement.

  • Featured: A closer look at the reproductive cycle of human immunodeficiency virus (HIV)
    A closer look at the reproductive cycle of human immunodeficiency virus (HIV)

    A closer look at the reproductive cycle of human immunodeficiency virus (HIV)

  • Featured: Complete Lifecycle of a Frog
    Complete Lifecycle of a Frog

    Complete transformation of tadpole to frog.

  • Featured: Root nodule development.
    Root nodule development.

    Nodule development involves a series of chemical signals sent back and forth between rhizobia and their host plants Legumes start this exchange by secreting particular flavonoid compounds from their roots ...
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