Question

6.2 Plant Tissues
6.2.1 MERISTEMATIC TISSUE
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an
Jar 1
Jar 2
es
Fig. 6.1: Growth of roots in onion bulbs
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Co
one
Activity
6.1
Take two glass jars and all them with
water.
Now, take two onion bulbs and place
on each jar, as shown in
Fig. 6.1.
Observe the growth of roots in both the
bulbs for a few days.
Measure the length of roots on day 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 of roots in both the
Jars and measure their lengths each
day for five more days and record the
observations in tables, like the table
below:
Length Day 1 Day 2 Day 3 Day 4 Day 3
Jar 1​

Answer 1

Answer:

aim:- to study increase in the length of the roots of Onion bulb by apical meristem.

The answer for this activity are as follows:-

1. onion in Jar 1 has longer roots because the keep on growing due to the presence of apical meristem in root tips.

2. roots stop growing in onion in jar 2 to as the root tips are removed.

3. the tips stop growing in Jar 2 after we cut them, because the apical meristem which results in increase in length of roots is removed.