Question

Question 09
Differentiate between internal fertilization and external fertilization.

Answer 1

Fertilization is defined as the fusion of a male and a female gametes.

Internal fertilization

• It occurs inside the female body.
• There are high chances of survival of the offspring.
• Internal fertilization protects the fertilized egg or embryo from harsh environments.
• Examples are cow, humans, dogs, monkeys etc.

External fertilization

• It occurs outside the female body.
• There are low chances of survival of the offspring.
• Most aquatic animals use this type of fertilization. The advantage of external fertilization is that it produces a large number of offsprings due to external hazards.
• Examples are fish, frog etc.