give 3 differences between oviparous and viviparous animal ?

VIVIPAROUS ANIMALS

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  • Animals  which give birth to young ones are called viviparous animals.
  • In viviparous animals the embryo develops inside the body of the female from which it gains nourishment
  • Ex: Dog, cow, cat, rat, human being.

 

OVIPAROUS ANIMALS

·  Animals which lay eggs are called oviparous animals.The eggs are then hatched by the mothers

·  Oviparous animal lay eggs before the embryos start developing with little or no other development within the mother

·  Ex: Lizard, frog, fish, snake, crow, hen, butterfly.

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Oviparous Viviparous
They lay eggs. They give birth to young ones.
Development takes place inside eggs. Development takes place inside mother.
Draw nutrition from the egg. Draws nutrition from the mothers body.
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OVIPAROUS ANIMALS :-

1. THEY LAY EGGS.

2. EXTERNAL FERTILISATION HELD IN OVIPAROUS ANIMALS.

3. EXAMPLES - FROG , FISH ETC.

 

VIVIPAROUS ANIMALS:-

1. THEY GIVE BIRTH TO YOUNG ONES .

2. INTERNAL FERTILISATION HELD IN VIVIPAROUS TYPES OF ANIMALS.

3. EXAMPLE - HUMANS,DOG,CAT,HEN ETC.

[ HEN IS AN EXAMPLE OF VIVIPAROUS ANIMALS {GIVEN IN THE BOOK -IN THE CROOSSWORD } ]

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There are 3 ways by which animals produce their young ones based on whether the
development of the zygote takes place outside the body of the female parent or inside i.e.,
whether they lay fertilized or unfertilized eggs or give birth to young ones. They are:

1. Oviparous
2. Viviparous
3. Ovoviviparous

Oviparous animals produce eggs that hatch outside the body of mother .e.g. Amphibians, birds, and most insects, fish, and reptiles etc. The eggs are covered by hard shell made up of calcium carbonate and laid in safe place in environment to protect the young ones from the predators. After a period of incubation young ones hatch out.

Viviparous animals:

In these animals, the zygote develops into a young one inside the body of the female e.g. majority of mammals including humans. After attaining a certain stage of growth the young ones are delivered out of the body of the female organism. The chances of survival of young ones is quite high in these animals because the mother provides proper 
embryonic care and protection to the developing embryo.

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