Reproduction In Animals Class 8 Worksheet with Solved in Pdf
Reproduction In Animals Class 8 Worksheet: In this page we have included Reproduction In Animals Chapter from Grade 8 Worksheet with solution.
Q.A.) Fill in the blanks.
1.) Zygote develops into new individual.
2.) In process of reproduction is the fusion of a sperm and an ovum.
3.) Fertilization which takes place inside the female body is called internal fertilization.
4.) External fertilization is seen in fish and star fish.
5.) Asexual reproduction is observed in amoeba.
6.) The reproductive parts in animals also produce gametes that fused to form a zygote.
Q.B.) Answer in one sentence.
1.) What is IVF?
Answer: – IVF ( in vitro fertilization) is the fertilization outside the body.
2.) What are sperms?
Answer: – The testes produce the male gametes called sperms.
3.) Explain fertilization?
Answer: – When sperms come in contact with an egg one of the sperms may fuse with the egg such fusion of the egg and sperm is called fertilization.
4.) Define internal fertilization.
Answer: – Fertilization which takes place inside the female body is called internal fertilization.
5.) Define external fertilization.
Answer: – The type of fertilization in which the fusion of a male and female gametes takes place outside the body of the female is called external fertilization.
6.) What is foetus?
Answer: – The stage of the embryo in which all the body parts can be identified is called a foetus.
7.) Define metamorphosis?
Answer: – The transformation of larva into an adult through drastic changes is called metamorphosis.
8.) Define binary fission.
Answer:- A type of asexual reproduction in which an animal reproduces by dividing into two individuals is called binary fission.
Q.C. Explain in detail.
Q.1.) Explain male reproductive organs.
Answer:- 1. The male reproductive organs include a pair of testes, two sperm ducts, and a penis.
2.) The testes produce the male gametes called sperms.
3.) Millions of sperms are produced by the testes.
4.) Sperms are very small in size each has a head, a middle piece and a tail.
5.) Each sperm is a single cell with all the usual cell components.
Q.2.) Explain female reproductive organs.
Answer:- 1. The female reproductive organs are a pair of ovaries, oviducts and the uterus.
2.) The ovary produces female gametes called ova.
3.) In human beings, a single matured egg is released into the oviduct by one of the ovaries every month.
4.) Uterus is the part where development of the baby takes place.
Q.3.) Explain viviparous and oviparous animals.
Answer:- a. Viviparous animals:- The animals which give birth to young ones are called viviparous animals.
b.) Oviparous animals:- Animals which lay eggs are called oviparous animals.
Q.4.) Explain the process of development of embryo.
Answer:- 1. Fertilization results in the formation of zygote which begins to develop into an embryo.
2.) The zygote divides repeatedly to give rise to a ball of cells.
3.) The cells then begin to form groups that develop into different tissues and organs of the body. This developing structure is termed as an embryo.
4.) The embryo gets embedded in the wall of the uterus for further development.
5.) The embryo continues to develop in the uterus. It gradually develops body part such as hands, legs, head, eyes, ears etc.
6.) The stage of the embryo in which all the body parts can be identified is called a foetus.
7.) When the development of the foetus is complete, the mother gives birth to the baby.
Q.D.) State true or false.
1.) The reproductive organ in female is testes.
Answer: – False
2.) Fertilization which takes place outside the body is called external fertilization.
Answer: – True
3.) Each sperm is single celled.
Answer: – True
4.) The ovary produces female gametes called ova.
Answer: – True