Question

The number of types of cells present in the adaxial epidermis of grasses.
a) \[1\]
b) \[2\]
c) \[3\]
d) \[4\]

Answer 1

Hint: Poaceous or Gramineae is a large family of monocotyledonous flowering plants known as grasses. This includes cereal, grasses, and bamboo. Grasses are grown and cultivated in natural lands like- lawns and gardens, fields also. Grasses have stems that are hollow except at the nodes and narrow alternate leaves borne in two ranks. The adaxial surface refers to the leaf's upper surface.

Complete answer:
a) \[1\]- The types of cells present in the adaxial epidermis of grasses are bulliform cells; only one type of cell is found. In monocots, they are enormous bubble-shaped cells found in the adaxial epidermis or on the upper surface of leaf cells. Hence the number of cells present is \[1\].
So, Option A is correct.
b) \[2\]- as we knew, there is only one type of cell present in the upper surface. And they are only present in grasses so \[2\] is absolutely wrong.
Option B is incorrect.
c) \[3\]- bulliform cells present in grasses are bubble shaped and they are larger in size, which are only present on the upper surface of leaves. They are generally present near the mid vein portion of the leaf and are large, empty and colorless.
Option C is incorrect.
d) \[4\]- bulliform cells are the motor cells which come under mesophyll cells and are present in Gramineae family. An exception might be there. Their morphology is combined with enlarged mesophyll colorless cells.
So, option D is not correct.

Hence, Option A is the correct answer.


Note:
As we discussed, the monocotyledon’s grasses possess many economical purposes too like- it can be used as a fodder component for grazing animals like- cows, sheep, goats. Herbivorous animals mostly survive and thrive upon plants like- grasses. In some regions around the world certain species of grasses are used as beverages like- tea and also in flavoring agents also used in spices and condiments.