Last Updated on April 17, 2024 by XAM CONTENT
Hello students, we are providing assertion reason questions for class 8 science. Assertion reason questions are the new question format that is introduced in CBSE board. The resources for assertion reason questions are very less. So, to help students we have created chapterwise assertion reason questions for class 8 science. In this article, you will find assertion reason questions for cbse class 8 science chapter 6 Reproduction in Animals.
| Chapter | Reproduction in Animals |
| Type of Questions | Assertion Reason Questions |
| Nature of Questions | Competency Based Questions |
| Board | CBSE |
| Class | 8 |
| Subject | Science |
| Useful for | Class 8 Studying Students |
| Answers provided | Yes |
| Difficulty level | Mentioned |
| Important Link | Class 8 Science Chapterwise Assertion Reason |
Assertion Reason on Reproduction in Animals
Questions:
Q.1. Assertion (A): In production of offspring, formation of zygote is necessary.
Reason (R): There are two modes of reproduction occur.
(a) Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
(b) Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A)
(c) Assertion (A) is true but reason (R) is false.
(d) Assertion (A) is false but reason (R) is true.
Difficulty Level: Easy
Ans. Option (d) is correct.
Explanation: There are two modes of reproduction in animals i.e. sexual and asexual reproduction. In sexual reproduction, a male and a female gamete (reproductive cells) fuse to form a single cell called zygote. This zygote gradually develops into an adult, similar to the parents. While in asexual reproduction only a single parent is involved. No fusion of gametes takes place to produce zygote.
Q.2. Assertion (A): Fertilisation can be external or internal.
Reason (R): The babies are born also through IVF technique.
(a) Both assertion (A) and reason (R) are true and reason (R) is the correct explanation of assertion (A).
(b) Both assertion (A) and reason (R) are true but reason (R) is not the correct explanation of assertion (A)
(c) Assertion (A) is true but reason (R) is false.
(d) Assertion (A) is false but reason (R) is true.
Difficulty Level: Easy
Ans. Option (a) is correct.
Explanation: In IVF technique freshly released eggs and sperms are put together for a few hours, and in this technique fertilisation is external, the zygote is allowed to develop for about a week and then placed in the uterus of the mother for further development. Like IVF in some animals such as fish, starfish and amphibians (animals who live in water as well as on land such as frogs) fertilisation takes place outside the body. While in humans, dogs, cows, birds, etc, fertilisation takes place inside the body of the female.
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Topics from which assertion reason questions may be asked
- Learning the modes of reproduction in animals.
- Learning process of asexual reproduction in microscopic organisms.
- Knowing various parts of the male and female reproductive system.
- Understanding the process of sexual reproduction.
- Understanding the process of fertilisation and development of embryo.
- Discussing the difference between viviparous and oviparous animals.
The process through which living beings produce new young ones of their own kind is called reproduction. Reproduction is necessary for the continuation of species, the transfer of variations from one generation to another and also for the addition of new species. This chapter deals with the reproductive systems and various modes of reproduction in animals.
