Explain the significance of bulliform cells.

Identify group of plants based on given anatomical characters in sequence.
$\mathrm{A})$ Bicollateral vascular bundles
$\mathrm{B})$ Bulliform cells
$\mathrm{C})$ Ring arrangement of vascular bundles

Answers respectively

Assertion ($\mathrm{A}$): The veins vary in thickness in dicot leaves, with reticular venation.

Reason ($\mathrm{R}$): The size of the vascular bundles is dependent on the size of the veins.

The transverse section of a plant shows following anatomical features:

(a) Large number of scattered vascular bundles surrounded by bundle sheath
(b) Large conspicuous parenchymatous ground tissue
(c) Vascular bundles conjoint and closed
(d) Phloem parenchyma absent

Identify the category of plant and its part:

Identify the labelled parts $1, 2, 3, 4$ in the below figure.

Fill in the blank with the correct answer from the bracket.

Bulliform cells are found in _____. (monocots, dicots, gymnosperms)

Read the following statements about the vascular bundles:
(a) In roots, xylem and phloem in a vascular bundle are arranged in an alternate manner along the different radii.
(b) Conjoint closed vascular bundles do not possess cambium.
(c) In open vascular bundles, cambium is present in between xylem and phloem.
(d) The vascular bundles of dicotyledonous stem possess endarch protoxylem.
(e) In monocotyledonous root, usually there are more than six xylem bundles present.

Choose the correct answer from the options given below :

Identify the labelled parts as $1, 2, 3, 4, 5$ of the water movement in a leaf shown in the figure ?