concept

Hedge mustard pollen

Sperm swimming towards an egg

Seminiferous tubule

The Germ-plasm : a theory of heredity / by August Weismann ; translated by W. Newton Parker and Harriet Ronnfeldt.

Zygote

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Gametes

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Seminiferous tubule

Sperm swimming towards an egg

Hedge mustard pollen

The Germ-plasm : a theory of heredity / by August Weismann ; translated by W. Newton Parker and Harriet Ronnfeldt.

Zygote