A) A - phellem, B - periderm, C - phellogen, D -phelloderm
B) A - phellem, B - complementary cells, C -phelloderm, D - periderm
C) A - complementary cells, B - phellogen, C -phelloderm, D - periderm
D) A - complementary - cells, B - phellem, C -periderm, D - phelloderm
Correct Answer: A
Solution :
Usually in the periderm of most plants, certain areas with loosely arranged cells have been found, which possess more or less raised and corky spots where the underneath tissues break through the epidermis. Such areas are universally found on the stems of woody plants. These broken areas are called lenticels. These are thicker radially than rest of the periderm because of the presence of losse complementary cells. The lenticels perform the function of exchange of gases during night or when the stomata are closed.
You need to login to perform this action.
You will be redirected in
3 sec
