. Science of plant life, a high school botany treating of the plant and its relation to the environment. Botany. 2o6 Science of Plant Life or male cell, with the egg, or female cell, is the act of fertilization. The fertilized egg to develop; that is, it grows and divides into a large number of cells, and from it eventually comes the embryo or young plant that is found within the seed. Fertilization is the essential part of sexual reproduction both in plants and animals, and it marks the actual beginning of a new generation. After the egg is fer- tilized, it is able to devel
. Science of plant life, a high school botany treating of the plant and its relation to the environment. Botany. 2o6 Science of Plant Life or male cell, with the egg, or female cell, is the act of fertilization. The fertilized egg to develop; that is, it grows and divides into a large number of cells, and from it eventually comes the embryo or young plant that is found within the seed. Fertilization is the essential part of sexual reproduction both in plants and animals, and it marks the actual beginning of a new generation. After the egg is fer- tilized, it is able to develop into a new plant or animal of the same kind as its parents. It should be understood that the sperms from one pollen tube fertilize the egg in only one ovule, and that to fertilize all the eggs, as many pollen tubes must. Fig. 123. Diagram to illustrate stages in the reproduction of a seed plant. A shows pollen grains (S) from anther (a) on top of stigma; B shows a stage in the growth of the pollen tube and the formation of the egg cell; C is the stage when the pollen tube has reached the egg and sperm and egg unite; D shows the formation of the embryo plant within the seed; and E shows the further development of the embryo and the maturing of the seed coats. The young plant thus formed and incased may remain ahve for years within the 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 Transeau, Edgar Nelson, 1875-1960. Yonkers-on-Hudson, N. Y. , World Book Co.
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectbotany, bookyear1921
