21.

Phellogen and Phellem respectively denote

•  Cork and cork cambium

• Cork cambium and cork

• Secondary cortex and cork

• Cork and secondary cortex

In which of the following pairs of parts of a flowering plant is epidermis
absent?

• Root tip and shoot tip

•  Shoot bud and floral bud

• Ovule and seed

• Petiole and pedicel

How many shoot apical meritsems are likely to be present in a twig of a plant possessing, 4 branches and 26 leaves

• 26

• 1

• 5

• 30

• 30

A piece of wood having no vessels (trachea) must be belong to

• Teak

• Mango

• Pine

• Palm

A plant tissue, when stained, showed the presence of hemicellulose and pectin in cell wall of its cells. The tissue represents

• Collenchyma

• Sclerenchyma

• Xylem

• Meristem

Fibres are likely to be absent in

• Secondary phloem

• Secondary xylem

• Primary phloem

• Leaves

What is the fate of primary xylem in a dicot root showing extensive secondary growth?

• It is retained in the centre of the axis

• Its gets crushed

• May or may not get crushed

• It gets surrounded by primary phloem

A vessel less piece of stem possessing prominent sieve tubes would belong to

• Pinus

• Eucalyptus

• Grass

• Trochodendron

Product of photosynthesis is transported from the leaves to various parts of the plants and stored in some cell before being utilised. What are the cells/ tissues that store them?

Protoxylem is the first-formed xylem. If the protoxylem lies next to phloem what kind of arrangement of xylem would you call it?