Frank Cce Everyday Science Solutions for Class 8 Science Chapter 9 Reproduction In Animals are provided here with simple step-by-step explanations. These solutions for Reproduction In Animals are extremely popular among class 8 students for Science Reproduction In Animals Solutions come handy for quickly completing your homework and preparing for exams. All questions and answers from the Frank Cce Everyday Science Book of class 8 Science Chapter 9 are provided here for you for free. You will also love the ad-free experience on Meritnation’s Frank Cce Everyday Science Solutions. All Frank Cce Everyday Science Solutions for class 8 Science are prepared by experts and are 100% accurate.

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1 (Across)- Egg
1 (Down)- Earthworm
2- Viviparous
3- Fertilisation
4- Ovulation



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(c) man
Man is a viviparous animal. Viviparous animals reproduce by giving birth to young ones.

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(c) uterus
Cervix is the lower narrow part of the uterus.

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(a) oviduct
The oviduct belongs to the female reproductive system. It is a tube that joins the ovaries to the uterus and transports the ovum from the ovaries to the uterus. Fertilisation takes place in the oviduct.

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(b) zygote
The fertilised cell is known as a zygote.

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(a) reptiles
Fertilisation is internal in reptiles.

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(a) binary fission
Amoeba reproduces through binary fission.

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(a) dog
Dog is unisexual—that is, it produces only one type of gamete.

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(a) Oviparous
Lizards, frogs and hens are examples of oviparous animals.

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(a) in vitro fertilisation
Fertilisation outside the animal body is known as in vitro fertilisation.

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(a) tadpole
Tadpole is the young one of a frog.

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1. Testes produce sperms.
2. The cells involved in sexual reproduction are called gametes.
3. Oviduct or fallopian tube joins the uterus and the ovary.
4. In animals like fish and frogs, external fertilisation takes place.
5. The human zygote gets implanted in the uterus wall.
6. IVF stands for in vitro fertilisation.

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Column A Column B
1. Sexual reproduction (f) Man
2. Asexual reproduction  (e) Hydra
3. Testes (d) Sperm
4. Ovary   (b) Ovum
5. Hermaphrodite  (a) Earthworm



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Ostrich has the largest eggs.

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Amoeba and Hydra do not reproduce sexually because they do not have distinct male and female sexes. They do not produce sex cells or gametes. Hence, they reproduce asexually to grow and multiply or continue their life form.

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In frogs, fertilisation takes place outside the body of the female. Female frogs lay eggs in large number because they are exposed to the external environment that may destroy many eggs. Hence, laying eggs in large number not only promotes fertilisation but also increases the chances of survival of at least few of the fertilised eggs.

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No, the transformation of puppies into adult dogs is not called metamorphosis. Metamorphosis is the transformation of a larva into an adult. Dogs give birth to puppies, which grow into adults slowly.

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If semen is not formed in male reproductive organs, then the male cannot fertilise the egg or ovum, as sperms will not reach the egg.

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1. (F) False. Internal fertilisation takes place inside the female's body.
2. (T) True. Birds and snakes both lay eggs. Hence, they are oviparous animals.
3. (T) True. The young one of a frog is called a tadpole.
4. (F) False. Organisms like Amoebae  multiply by binary fission.
5. (T) True. The fusion of male and female sex cells is called fertilisation.
6. (T) True. Monthly bleeding in women is called menstruation.

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Reproduction is a process by which organisms grow in number by producing offspring of their own kind.

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The fertilised egg or zygote undergoes repeated divisions to form an embryo, which is then implanted on the walls of the uterus.

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Testes produce male sex cells or gametes called sperms.

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A zygote is a fertilised egg that is produced when a sperm fuses with the egg.

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Lizard and snake are oviparous animals, while dog and cat are viviparous animals.

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The two common methods of reproduction are asexual reproduction and sexual reproduction.

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Asexual reproduction involves only one parent.

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Fertilisation is the process of the fusion of two gametes.

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Zygote is the another name of a fertilised egg.

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The female gamete in humans is called the egg or ovum.

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Hermaphrodites are the organisms in which both the male and female sex organs are located. Earthworm and Hydra are the examples of hermaphrodites.

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The male reproductive system consists of the following parts:
(a) Testis
(b) Vas deferens
(c)  Epididymis
(d)  Penis

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Gestation refers to the period between the fertilisation and the birth of the baby. It includes all the developmental changes that a zygote undergoes to form an embryo, which later becomes a foetus. In humans, it lasts for about 40 weeks or nine months.

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Metamorphosis is a biological process of transforming a larva into an adult. The process involves relatively abrupt changes in the animal's structure through cell growth and development. Frog and silkworm are examples of animals that develop through metamorphosis.



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Sperm     Ovum
It is the male gamete.   It is the female gamete.
It is produced in testes.   It is produced in ovaries.
It has a distinct head, neck and tail.  It is spherical in shape and has a centrally located nucleus.

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The placenta is an organ through which the foetus is attached to the uterus. The umbilical cord forms the link between the placenta and the foetus. The placenta is very important for the foetal development because it is responsible for the transfer of nutrients and oxygen from the mother to the foetus and also for the removal of wastes from the foetus.

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Zygote is formed by the fertilisation of the female and male gametes. The male gamete reaches the egg and fuses with it. This fertilised egg is called zygote.

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The human foetus derives its nutrition in the mother's womb through the placenta, which is attached to the foetus by the umbilical cord.

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Test tube babies are developed by the technique of in vitro fertilisation, in which the egg from the female parent and the sperms from the male parent are collected and allowed to fuse in a test tube. The zygote formed after fertilisation is allowed to develop for one week. It is then implanted in the uterus of the female for further development.

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In vitro fertilisation is a technique in which fertilisation takes place outside the body of the female. It is adopted by females who cannot bear babies because of blocked oviducts. In this technique, the egg from the female parent and the sperms from the male parent are collected and allowed to fuse in a test tube. The zygote formed after fertilisation is allowed to develop for one week and is then implanted in the uterus of the female for further development.

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The human female reproductive system consists of the following organs:
(a) Ovary – This almond-shaped organ is the main reproductive organ in females; it also acts as an endocrine gland. It secretes the female sex hormone oestrogen and produces female gametes, i.e., ova. Females have two ovaries.
(b) Uterus – It is the womb where the embryo develops till birth.
(c) Vagina – It receives the penis during sexual intercourse and helps in transferring semen into the female genital tract.

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External Fertilisation Internal Fertilisation
Fertilisation that takes place outside the female body is called external fertilisation.   Fertilisation that takes place inside the female body is called internal fertilisation.
Large number of eggs are produced.   Less number of eggs or a single egg is produced.
Examples include fish, frog and starfish.   Examples include humans, cows, and hens.

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(a) Fertilisation:
It is the process of the fusion of male and female gametes. It takes place in the fallopian tube of the human female. The fertilised egg is called zygote.

(b) Ovary:
This almond-shaped organ is the main reproductive organ in females; it also acts as an endocrine gland. It secretes the female sex hormone oestrogen and produces female gametes, i.e., ova. Females have two ovaries.

(c) Zygote:
Zygote is formed by the fertilisation of male and female gametes. The male gamete reaches the egg and fuses with it. The fertilised egg is called zygote.

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Binary fission in Amoeba:
Amoeba multiplies by binary fission. In this method, the nucleus divides first, forming two nuclei. Then the body of Amoeba divides by dividing its cytoplasm into two parts. Each part contains one nucleus. This process results in the development of two separate daughter Amoebae.

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The life cycle of a frog has three distinct stages:

Egg → Tadpole (Larva) → Adult frog

Female frogs lay eggs. The males then deposit their sperms over these eggs. The eggs that fertilise hatch into larvae known as tadpoles. The tadpoles look fish-like and contain gills, a tail and a small circular mouth. They can swim freely in water. After a few weeks, the tadpoles grow and undergo some changes in their structure because of cell growth and development. As a result, they gradually get transformed into adult frogs.

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In human beings, fertilisation takes place in the oviduct or the fallopian tube of the female. One of the sperms reaches the egg in the oviduct and fuses with it. This process is called fertilisation. During fertilisation, the nuclei of both the sperm and the egg fuse to form a single nucleus. This fertilised egg is called a zygote. This zygote then undergoes repeated divisions to form an embryo. The embryo then travels through the oviduct and gets attached to the walls of the uterus for further development.

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Sperms travel from the testes to the egg cell via a liquid called semen, which is released by the penis into the vagina during sexual intercourse. This semen contains millions of sperms that can swim in it. Once the semen is released in the vagina, the sperms move towards the oviduct where the egg cell is present. The sperm that reaches the egg first fuses with the egg cell, thus forming a zygote. This process is called fertilisation.

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Male Reproductive System



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