Difference between vivaporous and oviparous
Answers
Oviparous animals
These entities are egg-laying
Internal fertilization observed, but the development of the embryo is through external means
Hard shells of eggs render protection, once foetus matures, egg hatches
This feature of egg-laying animals is referred to as oviparity
Example – Birds, frogs, all fishes. Except for some snake species all other reptiles are oviparous, platypus and Echidna are egg-laying mammals.
Viviparous animals
Animals giving birth to offspring are known as viviparous animals
Development of the embryo and fertilization both occurs inside the female body
Matrotrophy is observed
Example – Dogs, cat, humans etc
Difference between Oviparous and Viviparous Animals
The table below depicts a few notable differences between Oviparous and Viviparous Animals
Oviparous Animals Viviparous Animals
What it means
Lay unfertilized or fertilized eggs Give birth to young ones while their development takes place within the body of the female counterpart
Fertilization-type
Can either be external or internal Internal
Zygote development
Embryo development occurs outside the embryo Embryo development occurs inside the embryo
Supply of nutrients to the embryo that is developing
Embryo obtains nutrients from
Egg yolk
Embryo obtains nutrients from the mother
Chances of survival
Less. This is because egg laying occurs in an external environment High as nourishment and care is provided inside the womb of the mother
Some examples
Fish, amphibians, insects, birds, reptiles Humans, dogs, elephants, cats etc
Categorization of species helps in understanding and learning features of entities belonging to that class on the whole. This way many deductions are carried out. Apart from these animals, there are animals referred to as ovoviviparous animals who produce eggs which develop inside the body of the mother.