differentiate between: a) sexual reproduction and asexual reproduction by) gametes and zygote c) external fertilization and internal fertilization d) viviparous and oviparous animals
Answers
Reproductive cell is known as gamets. There r two types of gamets 1)female gametes 2)male gametes. Zygote is the form after fertilization.
External ferrilization is that fertilization in which two parents gametes were fused outside the body but in internal fertilization they fused inside the body.
Sexual Reproduction
1) Male and female gametes
1) No production of gametes
are formed.
d
Asexual Reproduction
2) Involves fusion of male and female gametes 2) No fusion of gametes
3) Involves two organisms.
4) Offsprings have some characters
from male parent and other from female parent. Some characters may not be present in either of the parents
4) Produces offsprings that are identical to the parent.
b) Gametes and Zygote
3) Involves a single organism.
1) Millions of male gametes (sperms) are produced by the testes. These are microscopic and single celled. Sperm has a head, a middle piece and a tail Ovary produces female gametes called ova. It is a single cell (haploid).2) The fusion of male and female gamete is called Fertilization. The result of fertilization is the formation of a zygote. Zygote is a diploid cell. This develops mitorically and
forms into an embryo, which further develops into a baby
External Fertilization and Internal Fertilization The process of fertilization that occurs outside of an organism is called External Fertilization. E.g. Frog, Fish, Star fish, etc. The process of fertilization that takes place inside the body of females is called
Internal Fertilization Eg. Animals Human beings
d) Viviparous and Oviparous animals
Animals which give birth to their offsprings are called Viviparous animals.
Eg Animals, human beings. Animals which lay eggs are called oviparous animals
Eg. Hen Duck, Pigeon, etc.