Question

Site of fertilization in mammals is
A. Ovary
B. Uterus
C. Vagina
D. Fallopian tube

Answer 1

Hint: The fusion of the female gamete into the male gametes and initiate the development of new offspring by the process known as fertilization. In the ampulla of the uterine tube or the oviduct, the fallopian tube process of reproduction takes place in the mammals. Fertilized egg moves down the fallopian tube and implants in the uterus wall an embryo star development.

Complete answer:
Mammals are the vertebrate animals that are present in the class of mammalian and in the female’s production of the milk through the mammary glands. In the oviduct of the mammal’s fertilization take place and the ova is viable after 24 hours of fertilization. Activation of ovum, encounter of spermatozoa, ova, fusion of the sperm with the egg, capacitation or contact, and acrosome reaction or penetrations are the mechanism occurred during the fertilization in the mammals.
In the mammals a multicellular organism occurred during the early stage of fertilization in which 2 four cell stage embryos and eight cell stage embryos were present in it. But the beginning process of fertilization in all the other animals and mammals is mostly the same such as cleavage, growth and differentiation. During the process ectoderm, outer layer, middle layer, mesoderm, inner layer, endoderm are the germ layers obtained.

Therefore the correct option is (D).

Note: In the process of reproduction occurring within the body of the female animals, outside fertilization or inside fertilization completely depend upon the animal species and habitats. During the fertilization the fusion of the male sperm enters into the female egg and produces zygotes. And the gametes of the male and female produced diploid zygotes.