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Reproduction in animals





Viviparous and oviparous animals:

  • Animals that give birth to young ones are known as viviparous animals.
  • In these animals, the development of the embryo takes place inside the body of the mother, human, tiger, goats and cats are some examples of viviparous animals.
  • Animals that lay eggs are known as oviparous animals. In these animals, the development of embryo takes place in the egg after it is laid. Birds, lizards, crocodiles are some examples of oviparous animals.

Metamorphosis:

    A frog passes through three stages during its development from an egg to an adult frog:
    Development stages of frog
  • Butterflies and moths pass through four stages before winged adult is born:
    metamorphis in butterfly
  • The transformation of larva into an adult through drastic changes is called metamorphosis.



Asexual reproduction:

Asexual reproduction involves the production of new organisms by just one parent. Some of the asexual reproductions are:
Binary fission:
The process by which an organism reproduces by dividing into two cells from a single cell is called binary fission. Binary fission is seen in single-celled organisms, such as Amoeba and Paramecium.
Budding:
In budding, a new organism grows in the form of a bulb-like projection called a bud from the parent organism. It grows and may eventually break away from the parent. Yeast and Hydra reproduce by budding.



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Class 8 Maths Class 8 Science
Reference Books for class 8 science

Given below are the links of some of the reference books for class 8 science.

  1. Oswaal NCERT & CBSE Pullout Worksheets Class 8 Science These worksheets can help student evaluate whatever he/she has studied from the text books.
  2. Science for Class 8 Paperback by Lakhmir Singh Detailed science book to clear basics and concepts. I would say it is a must have book for class 8 student.
  3. Pearson Foundation Series (IIT -JEE / NEET) Physics, Chemistry, Maths & Biology for Class 8 (Main Books) | PCMB Combo : These set of books could help your child if he aims to get extra knowledge of science and maths. These would be helpful if child wants to prepare for competitive exams like JEE/NEET. Only buy if you can provide help to the child while studying.
  4. Reasoning Olympiad Workbook - Class 8 :- Reasoning helps sharpen the mind of child. I would recommend students practicing reasoning even though they are not appearing for Olympiad.

You can use above books for extra knowledge and practicing different questions.







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