sleep-spindles 发表于 2025-3-26 21:58:48
http://reply.papertrans.cn/32/3190/318932/318932_31.pngTruculent 发表于 2025-3-27 04:11:48
http://reply.papertrans.cn/32/3190/318932/318932_32.pngRadiculopathy 发表于 2025-3-27 08:53:09
Egg Laying and Provision for Posterity,e calmer waters near the shores of lakes. A little later, the common toads . deposit their eggs, embedded like pearls in long strings of jelly (Fig. lb). The European newts (. species) provide for each egg individually. They grasp leaves and stalks of aquatic plants with their hind legs and fold theDealing 发表于 2025-3-27 12:21:09
A Hormone as Trigger of Egg Laying,ry, on the underside of the brain (.) (cf. Fig. 2). This gland releases hormones into the blood in response to signals received from the hypothalamus, that part of the brain immediately adjacent. By mechanisms that are still quite obscure, seasonal changes in the environment are perceived and proces镶嵌细工 发表于 2025-3-27 17:31:22
http://reply.papertrans.cn/32/3190/318932/318932_35.pngAcetaminophen 发表于 2025-3-27 18:03:06
http://reply.papertrans.cn/32/3190/318932/318932_36.pngProtein 发表于 2025-3-28 01:56:29
http://reply.papertrans.cn/32/3190/318932/318932_37.pngSigmoidoscopy 发表于 2025-3-28 02:28:24
Does the Nucleus Have a Monopoly on Inheritance?, the nucleus cannot function by itself, but only in cooperation with the cytoplasm. The question which now poses itself is: can we locate the boundaries of the nuclear and cytoplasmic spheres of influence? Theodor Boveri designed an experiment which he believed must provide the answer. He combined m发炎 发表于 2025-3-28 08:09:55
Functions of the Genetic Material during Oocyte Maturation,g destined to form the gonad. Once there, they enter upon one of two paths of differentiation, leading towards either egg or sperm. At the completion of metamorphosis (4–6 months in many amphibian species) the young newts and frogs are still very small. They grow quite slowly, and it takes two to th使显得不重要 发表于 2025-3-28 11:02:30
From One Cell to Many,d in the zygote nucleus; all the specific construction elements and storage materials have been assembled in the cytoplasm. In the fertilized egg, therefore, everything is on hand which is essential for determination and guidance of the individual’s initial development. By the time development has b