Question

Mention any three advantages and disadvantages of internal fertilization
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Answer 1

When a sperm fertilizes an egg within the female, it is known as internal fertilization. The advantages of internal fertilization are that the fertilized egg is protected from predators and harsh environments, thus ending in higher chances of survival. Also, there is a lesser chance of desiccation of gametes.

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Answer 2

Answer:

Definition:

Internal fertilization is the union of an egg cell with a sperm during sexual reproduction inside the female body. For this to happen there needs to be a method for the male to introduce the sperm into the female's reproductive tract.

Advantages:

• 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:

• 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.

Examples:

Mammals (including humans), Reptiles, Birds, Bryophytes and Tracheophytes.