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Lateral view of the internal male reproductive organs.
The degree of cerebral cortex folding in different mammalian species. The brains are not shown to sc
Classification of life histories based on juvenile survival, fecundity, and age at reproductive matu
Comparing the extracellular environments of plants and animals
Hydrozoan. Hydra, a freshwater species capturing and digesting a water flea.
The production of a new allopolyploid species