Question

Mention the advantages and disadvantages of internal and external fertilization.

Answer 1

Answer:

Internal fertilization has the advantage of protecting the fertilized egg from dehydration on land. The embryo is isolated within the female, which limits predation on the young. Internal fertilization also enhances the fertilization of eggs by a specific male.

Disadvantages of internal fertilization are that there are lesser number of offspring produced at a given time because it is sometimes difficult for the male and female to come into intimate contact. Additionally, the risk of sexually transmitted diseases also increases.

Advantages of External Fertilization It results in increased genetic variations. It produces a larger number of offsprings. The gametes released can drift and therefore it is easy to find mates.

Disadvantages of external fertilization include a reliance on water and the large amount of wasted sperm and eggs that never reach a corresponding gamete, even when the organisms releasing the eggs and sperm are in close proximity. Additionally, the eggs released can have no shells, as these would stop sperm.

Answer 2

Answer:

Internal fertilization :–

Advantages

• Number of gametes required is less .
• The female takes sufficient care of the of the embryo untill the foetus develops within the body .

Disadvantages

• Transmission of diseases from the mother to the foetus can take place , in case the mother suffers from infectious diseases .

External fertilization :–

• The male doesn't necessarily need to deposit sperms at the same time and location .
• The female doesn't need to take care of the young ones and bring them up .

Disadvantages

• Production of more gametes requires more energy .