Last updated on June 28th, 2023 at 11:07 pm
Class 8 Reproduction in Animals
Learn about the various reproductive processes of animals, including external and internal fertilisation, viviparous and oviparous animals, metamorphosis, and asexual reproduction through budding and binary fission, in this comprehensive guide to Class 8 Reproduction in Animals.
Q: What is sexual reproduction?
Sexual reproduction is a type of reproduction that involves the fusion of male and female gametes.
Q: What are the male reproductive organs?
The male reproductive organs include a pair of testes, two sperm ducts, and a penis.
Q: What do the testes produce?
The testes produce male gametes called sperms.
Q: What are the female reproductive organs?
The female reproductive organs include a pair of ovaries, oviducts (fallopian tubes), and the uterus.
Q: What do the ovaries produce?
The ovaries produce female gametes called ova (eggs).
Q: Where does the development of the baby take place?
The development of the baby takes place in the uterus.
Q: What is fertilisation?
Fertilisation is the process in which a sperm and an ovum fuse together, resulting in the formation of a fertilised egg or zygote.
Q: What happens during fertilisation?
During fertilisation, the nuclei of the sperm and the egg fuse to form a single nucleus.
Q: What is inherited by the new individual during fertilisation?
The new individual inherits some characteristics from the mother and some from the father.
Q: What is internal fertilisation?
Internal fertilisation is the process of fertilisation that takes place inside the female body.
Q: Name some animals that undergo internal fertilisation.
Some animals that undergo internal fertilisation include humans, cows, dogs, and hens.
Q: What is external fertilisation?
External fertilisation is the type of fertilisation in which the fusion of a male and a female gamete takes place outside the body of the female.
Q: What animals commonly undergo external fertilisation?
Aquatic animals such as fish, starfish, etc. commonly undergo external fertilisation.
Q: What is the structure that holds frog’s eggs together and provides protection to them?
A layer of jelly holds the frog’s eggs together and provides protection to them.
Q: What is the result of fertilisation?
Fertilisation results in the formation of a zygote, which begins to develop into an embryo.
Q: Where does the embryo get embedded for further development?
The embryo gets embedded in the wall of the uterus for further development.
Q: What is the stage of the embryo in which all body parts can be identified called?
The stage of the embryo in which all body parts can be identified is called a foetus.
Q: How are chicks born in hens?
Chicks are born in hens after the developing embryo is enclosed in protective layers, including the hard shell, and laid as an egg. The embryo then takes about 3 weeks to develop into a chick.
Q: How does the chick develop inside the egg shell?
The chick develops inside the egg shell with the help of warmth provided by the hen who sits on the eggs.
Q: Where does the development of the embryo take place in animals that undergo external fertilisation?
In animals that undergo external fertilisation, the development of the embryo takes place outside the female body within their egg coverings.
Q: What is the difference between viviparous and oviparous animals?
Viviparous animals give birth to young ones while oviparous animals lay eggs.
Q: What is metamorphosis?
Metamorphosis is the transformation of a larva into an adult through drastic changes.
Q: What is budding?
Budding is a type of asexual reproduction in which new individuals develop as outgrowths from a single parent.
Q: What is binary fission?
Binary fission is a type of asexual reproduction in which an animal reproduces by dividing into two individuals.
