Titlebook: Experimental Studies of Amphibian Development; Ernst Hadorn Textbook 1974 Springer-Verlag Berlin Heidelberg 1974 Regeneration.biology.cell

sleep-spindles

Truculent

Radiculopathy

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 the

Dealing

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

鑲嵌細(xì)工

Acetaminophen

Protein

Sigmoidoscopy

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

發(fā)炎

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

使顯得不重要

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