NCERT Class 9 Science Chapter 6 Tissues Activity 6.1
Activity 6.1 Class 9 Science
belongs to Chapter 6 Tissues Class 9 Science. You will get a complete
solution with an explanation and a conclusion. After reading activity 6.1, you
will be able to answer the questions based on the activity.
Activity 6.1 Class 9 Science Chapter 6
You are suggested to study NCERT activity 6.1 class 9 science
chapter 6 explanation with a conclusion so that you can attempt questions based
on the activity 6.1 class 9 science.
Activity 6.1 Class 9 Science Aim
To show that Meristematic tissues are responsible for the growth
of plants.
Activity 6.1 Class 9 Science
·
Take two glass jars and fill them with water.
·
Now, take two onion bulbs and place o each
jar as shown in the figure.
·
Observe the growth of roots in both the
bulbs for a few days.
·
Measure the length of roots on days 1, 2, and 3.
·
On day 4, cut the root tips of the onion
bulb in jar 2 by about 1 cm. after this, observe the growth in both the
jars and measure their length each day for five more days and record the
observation on a table like a table below.
| Length | Day 1 | Day 2 | Day 3 | Day 4 | Day 5 |
|---|---|---|---|---|---|
| Jar 1 | |||||
| Jar 2 |
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Activity 6.1 Class 9 Science Observation
We observe that roots in both the bulbs for a few days grow almost
similarly but when we cut the tips of roots in jar B, there is no growth
seen in the roots in jar B.
| Lenght | Day 1 | Day 2 | Day 3 | Day 4 | Day 5 |
|---|---|---|---|---|---|
| Jar 1 | 2 cm | 2.5cm | 3cm | 3.5cm | 4.5cm |
| Jar 2 | 2 cm | 2.5cm | 3cm | nil | nil |
Activity 6.1 Class 9 Science Explanation
The growth of plants occurs in certain regions like apical, lateral, and
intercalary. These regions have dividing tissues called meristematic
tissues. These tissues are responsible for growth in plants.
Activity 6.1 Class 9 Science Conclusion
From activity 6.1, we can conclude that the growth of plants occurs in certain
region which has meristematic
tissues that
are responsible for the growth
Questions based on
observation activity 6.1 class 9 science
1.
Which of the two onions has longer roots? why?
2.
Do the roots continue growing even after we have removed
their tips?
3.
Why would the tips stop growing in jar 2 after we cut
them?
Answers to questions based on activity 6.1 Class 9 Science
1. The root tips in jar 1 grow longer because the root tips of the onion bulb have not been cut.
2. No, the roots do not continue growing after removing root tips because they don’t have meristematic tissues in their tips.
3. The meristematic tissues are responsible for the growth of plant parts. These tissues are found in the tips of roots and stem and increase the length of roots and stem. When we cut the tips, the meristematic tissues present in the tips region also get removed so there is no growth is seen.
Related Topics for you
1. Activity 6.2 Class 9 Science
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