Question

Shweta has placed an onion bulb on a jar containing water. After 2-3 days she observed that roots are coming out. She left the onion bulb for a few more days. She observed that roots are growing continuously. Then she cut the root tips and placed the onion bulb on the jar containing water. 2marksa. Why does rooting occur in onion bulbs kept in glass jars containing water? b. What would be her observations after cutting root-tips and why? ​

Answer 1

When the root tips of onion bulb are cut, the cells in the root tip die and hence, growth stops because the tip of the roots contains the meristematic tissue which is responsible for growth. Meristematic tissues are at a constant state of division