Difference between internal and external fertilization ?

Question

Answer

In internal fertilization fusion of gametes take place inside body
Zygote forms inside female body example - human beings

But,
In external fertilization fusion of gametes take place outside body
Zygote forms outside body and
Both sexes discharge it's gamete outside body
Example - frog

Answer

The main difference between internal and external fertilization is that internal fertilization occurs inside the female organism whereas external fertilization occurs outside the female organism. Oviparity, viviparity, and ovoviparity are the three methods of internal fertilization. Internal fertilization occurs in mammals, reptiles, some birds, and some fish. External fertilization occurs in frog, fish, mollusks, and crustaceans. Internal fertilization shows high survival rates of the embryo than the external fertilization.

Answer

Internal fertilization is when the male deposits his sperm directly into the female's body.

External fertilization is when the male and female's gametes unite outside the female's body.

difference between internal and external fertilization

Internal fertilization occurs inside the body, whereas external fertilization happens outside the body.

Fertilization is the process by which a sperm cell and an egg cell unite to form a completely new individual.

Unlike internal fertilization, external fertilization generally needs a wet environment so that the gametes, or reproductive cells (the sperm and eggs), won't dry out and the sperm will be able to efficiently swim towards the eggs in order to fertilize them.

Answer

Internal vs. External Fertilization

Internal fertilization and external fertilization are two methods by which organisms reproduce. Here are the key differences between the two:

Internal Fertilization
- Internal fertilization occurs inside the body of the organism.
- It is common in terrestrial animals such as mammals, birds, and some reptiles.
- In internal fertilization, sperm fertilizes the egg inside the female's reproductive tract.
- This method provides protection for the developing embryo as it is shielded from external threats.
- It requires specialized reproductive organs such as copulatory organs or structures for the transfer of sperm.

External Fertilization
- External fertilization occurs outside the body of the organism.
- It is common in aquatic organisms such as fish, amphibians, and most invertebrates.
- In external fertilization, eggs and sperm are released into the environment where fertilization takes place.
- This method exposes the developing embryo to external dangers such as predators and environmental conditions.
- It does not require specialized reproductive organs for mating.

Comparison
- Internal fertilization is more efficient in terms of fertilization success as it ensures direct delivery of sperm to the egg.
- External fertilization typically involves the production of a large number of eggs and sperm to increase the chances of fertilization.
- Internal fertilization allows for parental care of offspring, while external fertilization usually involves minimal or no parental involvement.

In conclusion, internal and external fertilization are two distinct reproductive strategies with their own advantages and limitations. The choice of fertilization method depends on the species and its adaptations to its environment.

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