Question

the appearance of swelling in the stem of a plant with phloem removed as shown in the figure below .explain the reason​

Answer 1

Answer:

The tissue after removing the phloem, swells because phloem is responsible for transporting food throughout the body. When a pipe taking water cracks or gets cutted, all the water flows out. The same way when the phloem, or the pipe is cut off, all the sap flows out. One more reason is that the phloem is sending sap to the cut and then it gets out, so the plant's tissues have swollen to grow some roots so that the part below tha cut can also be given a supply of sap. If sap will not reach the bottom, neither the roots nor the xylem or any other tissue will work and the whole plant will die.