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 | Butterfly and coneflower photograph (32K) © 1991 Noel Dunn |
 | Blepharisma swimming (4.2 MB) |
 | Kenya grasslands photograph (45K) © 1993 Lisa Hertzenberg |
 | Daphnia resting (1.7 MB) |
 | Saw-whet owl photograph (35K) © 1989 Bruce Fall |
 | Phenylalanine (896K) |
 | Photosystem diagram (9K) |
 | tRNA (1.1 MB) |
 | Antiparallel DNA diagram (8K) |
 | Chlorophyll (768K) |
 | Antigenic determinants diagram (8K) |
 | ATP (736K) |
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 | Adenine (920K) |
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 | Cytosine (939K) |
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 | Guanine (953K) |
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 | Thymine (1.1 MB) |