. Heredity in relation to evolution and animal breeding, . Heredity. THE DUALITY OF INHEEITANCE in the reduced condition, N, and these germi- nate into tlie prothallus, which accordingly is. Fig. 7. — The prothallus of a fern, which reproduces by sexual cells, eggs and sperm. The eggs are borne in the sac-like "archegonia," just below the notch in the figure. They, like the sperm-forming "antheridia," lie on the under sur- face of the flattened prothallus which is here viewed from below. Notice the root-hairs or rhizoids by which the plant feeds. Highly magnified. (After Co
. Heredity in relation to evolution and animal breeding, . Heredity. THE DUALITY OF INHEEITANCE in the reduced condition, N, and these germi- nate into tlie prothallus, which accordingly is. Fig. 7. — The prothallus of a fern, which reproduces by sexual cells, eggs and sperm. The eggs are borne in the sac-like "archegonia," just below the notch in the figure. They, like the sperm-forming "antheridia," lie on the under sur- face of the flattened prothallus which is here viewed from below. Notice the root-hairs or rhizoids by which the plant feeds. Highly magnified. (After Coulter, Barnes, and Cowles.) N throughout. But when the prothallus forms reproductive cells, no reduction occurs. Its egg-cells and its sperm-cells in common with 23. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Castle, William E. (William Ernest), 1867-1962. New York ; London : D. Appleton and Company
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishernewyorklondondappl
