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ovipary

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caecilian

Overview page. Subjects: Zoology and Animal Sciences.

; class Amphibia, order Apoda)

A family of caecilians that are mainly terrestrial as adults. Development is oviparous or ovoviviparous, often with a free-swimming larval stage....

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egg

Overview page. Subjects: Ecology and Conservation.

The reproductive structure of certain animals, e.g. reptiles, birds, and insects, consisting of an ovum together with nutritive and protective tissues, and from which, when fertilized, a...

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fertility

Overview page. Subjects: Biological Sciences.

1 The potential capability of an organism to reproduce itself. In sexually reproducing plants and animals it is the number of fertilized eggs produced in a given time. For...

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Hadromerida

Overview page. Subjects: Zoology and Animal Sciences.

(class Demospongiae, subclass Tetractinomorpha)

An order of sponges in which the body has a radial structure. Spicules and organic fibres form the skeleton. The cortex is simple....

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Onychophora

Overview page. Subjects: Biological Sciences.

A small phylum of caterpillar-like invertebrates – the velvet worms – that inhabit moist dark terrestrial habitats, such as forest litter and caves, in tropical and warm regions. The thin...

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ovovivipary

Overview page. Subjects: Ecology and Conservation — Zoology and Animal Sciences.

The method of reproduction in which young develop from eggs retained within the mother's body but separated from it by the egg membranes. The eggs contain considerable yolk which provides...

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viviparous

Overview page. Subjects: Biological Sciences.

1. producing living young rather than eggs. Embryogenesis occurs within the mother's body, as with most mammals. 2. bearing seeds that germinate within the fruit, as in the...

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