Question

Give example of viviparous animals
A. Human beings
B. Frog
C. Butterfly
D. All of the above

Answer 1

Hint:Oviparous animals undergo external fertilisation, while viviparous animals undergo internal fertilisation. Most mammals are viviparous animals.

Complete answer:
Reproduction is essential for the continuation of a species. Organisms reproduce either by the fusion of gametes (sexually) or without the development of gametes (asexually). In sexual reproduction, the fusion of egg and sperm is known as fertilisation. The nucleus of the sperm and the egg fuses to form a single nucleus. It results in the development of a fertilised egg or zygote. Fertilization may take place either inside or outside the body. The fertilisation that takes place within the female body is called internal fertilisation. Internal fertilisation occurs in a variety of species, including humans, cows, dogs and hens. External fertilisation is the fertilisation that occurs outside the body. This form of fertilisation is often used in aquatic animals such as fish. In animals undergoing external fertilisation, embryo production takes place outside the female body. Embryos continue to develop under their egg covers.

The animals that give birth to young ones are called viviparous animals. The animals that lay eggs are considered oviparous animals. Animals such as birds, lizards, frogs, and butterflies that lay eggs are oviparous animals.

Thus, the correct answer is option A i.e., Human beings.

Note:In viviparous animals, the developing embryo is continually fed by the mother, normally via a placenta or similar structure. Viviparous animals are found in all vertebrates except birds.