REPRODUCTION AND ITS MODES
Do you recall the processes of digestion, circulation, and respiration which you have studied in your previous classes? These processes are essential for the survival of every individual. You have also learnt about the process of reproduction in plants. Reproduction is essential for the continuation of a species. Imagine what would have happened if organisms had not reproduced.
You will realise that reproduction is very important as it ensures the continuation of similar kinds of individuals, generation after generation. You have already learnt in your previous class about reproduction in plants. In this chapter, we shall learn how reproduction takes place in animals.
Modes of Reproduction
Have you seen the young ones of different animals? Try to name some of the young ones by completing Table 9.1 shown in examples at S. No. 1 and 5.
|
S. No. |
Animal |
Young one |
|
1. |
Human |
Baby |
|
2. |
Cat |
|
|
3. |
Dog |
|
|
4. |
Butterfly |
|
|
5. |
Hen |
Chick |
|
6. |
Cow |
|
|
7. |
Frog |
|
Table 9.1:
You must have seen the young ones of various animals being born. Can you tell how chicks and caterpillars are born? How are kittens and puppies born? Do you think that these young ones looked the same before they were born as they do now? Let us find out.
Just as in plants, there are two modes by which animals reproduce. These are:
i. Sexual reproduction, and
ii. Asexual reproduction
Source: This topic is taken from NCERT TEXTBOOK