Question

Both kidney-shaped and dumbbell-shaped guard cells are present in
a. Chenopodium
b. Calotropis
c. Cyperus
d. None of the above

Answer 1

Stomata Is a part of a plant defined as a minute opening or pore present on The plant leaves, stem and another part of the plant. Almost all terrestrial plants have a stoma. It helps in the exchange of gases between plants and surroundings. Also, control the loss of water from the plant body.

Complete answer:

Option A:
Chenopodium is a perennial plant. It Grows everywhere in the World which belongs to the family Amaranthaceae. It is a dicot plant guard cells are kidney-bean shaped cells, not dumbbell-shaped cells.

Option B:
Calotropis Is commonly called a Milkweed plant. Because it produces milk latex. It belongs to the family Apocynaceae. It is a dicot plant guard cell arrangement in the stomach that is kidney- bean-shaped.

Option C:
Cyperus is also known as nut grass or nutsedge (related to other species belonging to the same family) it is normally grown in a rough dry condition or wilderness crop field. Cyperus is a monocot plant. Kidney shaped guard cells are present in dicot plants inner wall of guard cells are boundaries an outer wall inner wall is thicker than the outer wall. In monocot plants dumbbell-shaped stomata are present but in case of cyperus, both kidney and dumbbell-shaped guard cells are present.

Hence, the correct answer is option (C).

Note: Guard cells are specialized cells present on the epidermis of Stem, leaves, roots etc. Cyperus belongs to the family Cyperaceae. Cuperus species like Cyperus esculentus microfibrils positioning are modified with the environment condition. The arrangement of guard cells varies in a different orientation. So even in monocot plants also dumbbell-shaped guard cells are seen.