7. Explain the term fertilisation. Describe the process of fertilisation in human beings 8. Why are not all animals oviparous? Does being viviparous offer any advantage to organisms?
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Answers
Answer:
1)Human fertilization is the union of a human egg and sperm, usually occurring in the ampulla of the fallopian tube. The result of this union is the production of a zygote cell, or fertilized egg, initiating prenatal development. ... The process of fertilization involves a sperm fusing with an ovum.
2)All animals are not oviparous this is due to the fact that these have do not exhibit the capability to lay the eggs. The vivipary animals have the advantage that is fertilization takes place within the female body thus the embryonic development is safe within the mothers womb.
Answer:
7. A biological process in which the fusion of the male and the female gamete occurs is called fertilization.
•The sperms are released from the male reproductive organ called the penis.
•The sperm enters the female body through one of the parts of her reproductive organ called the vagina.
•Then the sperm travels through the fallopian tubes and meets the egg produced by the female organs.
•The process of fertilization takes place in fallopian tubes.
•The first step in the process of reproduction is the fusion of a sperm and an ovum.
•During fertilization, the nuclei of the sperm and the egg fuse to form a single nucleus. This results in the formation of a fertilized egg or zygote.
•The zygote is the beginning of a new individual.
The zygote is the beginning of a new individual.Fertilization results in the formation of a zygote which begins to develop into an embryo.
8. All animals are not oviparous because each animal has different inbuilt system for reproduction.
The main advantage is that a viviparous young one is less vulnerable to predator and external environment as compared to ooviparous because the youngones develop inside mothers body .
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