Oviparous | viviparous | Ovoviviparous | Class 12 Biology In Urdu Hindi

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About This Video ........................

In This Video Lecture You Will Learn Basic Concept Of oviparous
In terrestrial conditions, fertilization is internal. Sperms are lodged in the female body where
eggs to protect the developing embryo from harsh terrestrial conditions. Such animals are called
In some mammals like duckbill platypus and spiny ant-eater internal fertilization leads to internal
accomplished inside the female body, which gives birth to young one - such animals are called
viviparous.
oviparous.
In mammals, internal fertilization leads to internal development and development of embryo is
which hatches to ofspring This is called ovoviviparous condition.
fertilization occurs. This may lead to external development as in reptiles and birds. They lay shelled
development. Nourishment is provided either through stored food in the egg or through placenta
development of young one in a shelled egg and when development is completed, shelled egg is laid
Viviparous and ovoviviparous animals provide more protection to their young one during
by the mother.

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