What makes medullary rays in animals ?

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 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

Select the incorrect option with respect to the given anatomy of the plant part.

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

Stem hair is _____.(unicellular, meristematic, multicellular)

Read the following statements with respect to the dicot stem and select the correct option.

(a) Epidermis is covered with a thin layer of cuticle, may bear trichomes, and a few stomata.

(b) Ring arrangement of conjoint, collateral, and open vascular bundles. 

(c) Presence of semilunar patches of sclerenchyma above the phloem.

(d) Presence of conjunctive tissue between the xylem and the phloem.