NEET BIOLOGY

Detailed explanation-1: -In animals which undergo external fertilisation, development of embryo takes place outside the female body. For e.g., in frogs, both male and female release their gametes in water. The fusion of gametes to form zygote takes place in the water, outside the body of both the parents.

Detailed explanation-2: -What is External Fertilization? Fertilization that occurs outside the body of an organism is known as external fertilization. It usually requires a water body for successful fertilization. The sperms and eggs are released in an external environment.

Detailed explanation-3: -In vitro fertilization (IVF) is the joining of a woman’s egg and a man’s sperm in a laboratory dish. In vitro means outside the body.

Detailed explanation-4: -Key Points. External fertilization is characterized by the release of both sperm and eggs into an external environment; sperm will fertilize the egg outside of the organism, as seen in spawning.

Detailed explanation-5: -What are oviparous animals? Animals that reproduce by laying eggs are called oviparous animals. In these animals, the process of both fertilization and embryo development does not occur inside the mother. Birds and frogs are examples of oviparous animals.