Question

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Take two glass jars and fill them with water. Now, take two onion bulbs and place one on each jar. Observe the growth of roots in both the bulbs for a few days. Measure the length of roots on 1st, 2nd and 3th day. On day 4 cut the root tips of the onion bulb in jar 2 by about 1 cm. After this, observe the growth of root in both the jars and measure their lengths each day for 7 days. Record the observation in a table as:
Observation table:
Length in (cm)
Day
1
Day
2
Day
3
Day
4
Day
5
Day
6
Day
7
Jar 1
Jar 2
Plot a graph based on your observations and derive the conclusion.

Answer 1

TAKE 2 GLASS JARS AND FILL THEM WITH WATER. NOW TAKE TWO ONION BULBS AND PLACE ONE ON EACH JAR. OBSERVE THE GROWTH OF ROOTS IN BOTH THE BULBS FOR FEW DAYS. MEASURE THE LENGTHS OF ROOT ON DAY 1 , 2,AND3 . ON DAY 4 CUT THE ROOT TIPS OF THE THE ONION BULB IN JAR 2 BY 2 CM. AFTER THIS OBSERVE THE GROWTH OF BOTH.

QUESTIONS:

1. WHICH OF THE 2 ONIONS HAVE LONGER ROOT, WHY ?

2. DO THE ROOTS CONTINUE GROWING EVEN AFTER WE HAVE REMOVED THE TIPS?

3.WHY WOULD THE TIPS STOP GROWING IN JAR 2 AFTER WE CUT THEM ?