Germinal Nodule

Germinal node is an unusual word. What a coincidence between the sound of the word “embryo” and some unknown piece of the alphabet. Usually I know the meaning of this or that word, but here I can’t even understand where people got this name from. You just need to study it and everything will become clear. We will talk about viviparity, this is the ability of organisms to develop during intrauterine development in the presence of the mother. Viviparous organisms do not lay eggs or eggs. According to the book by Kuchinsky A.P., in the wild, mammals give birth 7 times more often, fish 6 times, and reptiles and birds 5 times more often. Intrauterine development in mammals and birds occurs in the same way as in egg-laying animals. Cartilaginous fish have ovoviviparity. Among arachnids there are viviparous ones, that is, laying eggs along with the offspring that have already hatched from them. Somewhere between oviposition and viviparity are the births of amphibians (during the period of metamorphosis, tadpoles are born in eggs). Many invertebrates (worms, insects) are viviparous. The subclass of siphonophores is dioecious, having both male and female reproductive cells