Question

Differentiate between :

Viviparous and oviparous
Internal fertilization and external fertilization​

Answer 1

Answer:

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

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

Internal Fertilization

Fusion of gametes within the body of the female

Lesser is released and deposited inside the body of the female

Only male gametes are discharged into the female genital tract

Example Reptiles, Birds, Mammals, Tracheophytes, Pteridophytes

External Fertilization

Union of the gametes in an external environment(Water bodies)

Multiple gametes(both male and female) released into the external environment

Both female and male gametes are discharged into the external surroundings

Examples Algae, Fish, Amphibians

Answer 2

Required Answer :

Difference between viviparous and oviparous :

• Viviparous → Viviparous animals are those which give birth to young ones and nurse their young ones with their milk . Viviparous are mostly mammals.

For example : Cow, humans, cats etc.

• Oviparous → Viviparous animals are those which don't give birth to young ones. They give birth by laying eggs.

For example : Hen, tortoise etc.

Difference between internal fertilization and external fertilization:

• Internal fertilization

→ In internal fertilization, the fusion of male and female gametes takes place inside the body of the female.

Example : Internal fertilization can be seen in most mammals, reptiles and insects.

• External fertilization

→ In external fertilization, the fusion of male and female gametes takes place outside the body of the female.

Example : External fertilization can be seen in fishes and frogs.

More :–

• Fertilization is the fusion of male and female reproductive cells or gametes.

• Male reproductive cells are called sperms.

• Female reproductive cells are called eggs or ova.

• Some mammals also lay eggs like echidna and platypus.