吃掉
发表于 2025-3-25 05:58:18
Formative Movements, The middle layer is the . — its cell produce skeleton, musculature, circulatory system, gonads and kidneys. Innermost we find the ., from which develop the digestive tract, the liver, the lungs and other internal organs.
CHOIR
发表于 2025-3-25 09:58:32
On the Mechanism of Embryonic Induction, biologists have termed the ’twenties the “Period of Hope”, the next decade the “Period of Confusion”, and the ’forties the “Period of Depression”. The years since 1950 are perhaps a “Period of Renewed Hope”. Let us now recount some of the things that have been clarified in the course of all these ups and downs.
江湖骗子
发表于 2025-3-25 14:47:09
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可触知
发表于 2025-3-25 18:12:06
Wandel zum hybriden Wohlfahrtsmix,at the haploid maternal chromosomal set of the egg nucleus contains a complete assortment of genetic factors. That which normally is provided by the father merely leads to a doubling of the genes, and so should be dispensable.
overrule
发表于 2025-3-25 22:46:36
Der sozialpsychische Organismus,ree years for them to reach full size. Under the influence of the gonadotropic hormones of the hypophysis (p. 4), the gonads increase in size during this youthful phase and the germ cells develop into mature, fertile, gametes.
Coronary-Spasm
发表于 2025-3-26 02:59:21
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guzzle
发表于 2025-3-26 08:07:28
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摘要
发表于 2025-3-26 08:58:33
Fatherless and Motherless Beings,at the haploid maternal chromosomal set of the egg nucleus contains a complete assortment of genetic factors. That which normally is provided by the father merely leads to a doubling of the genes, and so should be dispensable.
cumulative
发表于 2025-3-26 14:43:39
Functions of the Genetic Material during Oocyte Maturation,ree years for them to reach full size. Under the influence of the gonadotropic hormones of the hypophysis (p. 4), the gonads increase in size during this youthful phase and the germ cells develop into mature, fertile, gametes.
不能约
发表于 2025-3-26 20:32:48
Toward Order and Pattern: Cells on the Move,members of cohesive units. The sheet of mesoderm migrates inward, involuting around the blastopore lip and coming to lie beneath the ectoderm where it forms the roof of the archenteron. The endoderm also disappears inside the embryo, becoming embedded in mesoderm, while the ectodermal sheet stretches to cover the whole embryo.