aplacental viviparity

aplacental viviparity: also called ovoviviparity (production of eggs that are fertilised and hatch inside the mother but the embryos lack a placental connection to the oviduct or uterus and so do not feed off the mother. The young are born as miniature adults, free-swimming and feeding)

Игры ⚽ Нужен реферат?

Ovoviviparity — Ovoviviparity, ovovivipary, or ovivipary, is a mode of reproduction in animals in which embryos develop inside eggs that are retained within the mother s body until they are ready to hatch. Ovoviviparous animals are similar to viviparous species… … Wikipedia
Tawny nurse shark — Conservation status Vulnerable ( … Wikipedia
Daisy stingray — Pearl stingray Conservation status Endangered (IUCN 3.1)[1] … Wikipedia
Estuary stingray — Conservation status Vulnerable (IUCN 3 … Wikipedia
Marbled electric ray — Not to be confused with Torpedo sinuspersici, also known as the marbled electric ray. Marbled electric ray … Wikipedia
Leopard shark — Taxobox name = Leopard shark image width = 240px status = LR/cd status system = IUCN2.3 regnum = Animalia phylum = Chordata classis = Chondrichthyes subclassis = Elasmobranchii ordo = Carcharhiniformes familia = Triakidae genus = Triakis species … Wikipedia
South China cookiecutter shark — Taxobox name = South China cookiecutter shark status = trend = image caption = regnum = Animalia subregnum = Deuterostomia phylum = Chordata classis = Chondrichthyes subclassis = Elasmobranchii ordo = Squaliformes familia = Dalatiidae genus =… … Wikipedia
Bluntnose stingray — Conservation status Least Concern ( … Wikipedia

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