Cells of this tissue are living and show angular wall thickning. They also provide mechanical support. The tissue is

1. xylem

2. sclerenchyma

3. collenchyma

4. epidermis

6. Epiblema of roots is equivalent to

(a) pericycle

(b) endodermis

(c) epidermis

(d) stele

A conjoint and open vascular bundle will be observed in the transverse section of

1. monocot root

2. monocot stem

3. dicot root

4. dicot stem

Phellogen and phellem respectively denote

1. cork and cork cambium

2. cork cambium and cork

3. secondary cortex and cork

4. cork and secondary cortex

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

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

1. teak

2. mango

3. pine

4. palm

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

14. Fibres are likely to be absent in

(a) secondary phloem

(b) secondary xylem

(c) primary phloem

(d) leaves

When we peel the skin of a potato tuber, we remove

1. periderm

2. epidermis

3. cuticle

4. sapwood

A vesselless piece of stem possessing prominent sieve tubes would belong to
1. Pinus
2. Eucalyptus
3. Grass
4. Trochodendron