3. Complete Activity 6.3 (Page 73). Get permanent slides of hydra. Observe them using hand lens or a microscope. Look out for any bulges from the parent body. Count the number of bulges that you see in different slides. Also, note the size of the bulges. Draw the diagram of hydra, as you see it. Compare it with the Fig. 6.11.
Answer: The above activity can be carried out as follows:
Aim: To examine bulges from hydra in each slide, draw the diagram of hydra and compare it with Fig. 6.11.
Materials Required: Threepermanent slides of hydra, microscope, pencil, paper.
Procedure:
(i) Observe the permanent slides, each containing one hydra under a microscope.
(ii) Count the number of bulges that you see in the hydra in different slides and note the size of the bulges.
(iii) Draw the diagram of hydra and compare it with the Fig. 6.11.
Observations:
The following observations for the hydra in the three slides were noted:
| Slides | Number of bulges | Size of bulges |
| Slide 1 | 3 | All medium sized |
| Slide 2 | 2 | 1 medium sized, 1 small |
| Slide 3 | 1 | Small |
The hydra in Slide 1 is shown below:
The sketch of the hydra in Slide 3 is shown below. It is similar to the drawing in Figure 6.11.
Conclusions: Hydra reproduces via bulges in its body called buds. This type of reproduction is called asexual reproduction.
“Get permanent slides of hydra. Observe them using hand lens or a microscope. Look out for any bulges from the parent body. Count the number of bulges that you see in different slides. Also, note the size of the bulges. Draw the diagram of hydra, as you see it. Compare it with the Fig. 6.11.” – Solved.
Related Links:
Solution to Extended Learning Problem 1
Solution to Extended Learning Problem 2
Solution to Extended Learning Problem 3
Solution to Extended Learning Problem 4
Solution to Activity 6.1
Solution to Activity 6.2
Solution to Activity 6.3
Solutions to Chapter 6 Reproduction in Animals
