Question

Match the names of the structures listed with the functions given. Choose the answer which gives the correct combination of the alphabets of the two columns.

	List I		List II
A	Stomata	1	Protection of stem
B	Bark	2	Plant movements
C	Cambium	3	Secondary growth
D	Hydathodes	4	Transpiration
		5	Guttation

• A. A- 4, B- 1, C- 3, D- 5
• B. A- 3, B- 2, C- 5, D- 4
  
• C. A- 2, B- 5, C- 1, D- 3
  
• D. A- 1, B- 4, C- 5, D- 2
  

Answer 1

The correct option is A A- 4, B- 1, C- 3, D- 5

Stomata is a pore, found in the epidermis of leaves, stems and other organs that is used to control gas exchange i.e transpiration. The pore is bordered by a pair of specialized parenchyma cells, known as guard cells that are responsible for regulating the size of the opening.

Bark is the outermost layers of stems and roots of woody plants. Plants with bark include trees, woody vines, and shrubs. Bark protects the stem.

In plant science, secondary growth refers to the growth that results from cell division in the cambia or lateral meristems and that causes the stems and roots to thicken.

A hydathode is a type of secretory tissue in leaves, usually found in Angiosperms, that secretes water through pores in the epidermis or margin of leaves, typically at the tip of a marginal tooth or serration. Hydathodes are involved in the process of guttation, in which positive xylem pressure (due to root pressure) causes liquid to exude from the pores.