Chap. 27 : Plant Tissues

Question 1

Define Ground Tissue

Answer 1

Tissues that make up a bulk of the plant body

Question 2

Define Vascular Tissue

Answer 2

Tissue that distributes water and nutrients to all parts of plant body

Question 3

Purpose of dermal tissue

Answer 3

Cover and protect the plant body

Question 4

Differences between eudicots and monocots

Answer 4

Eudicots- petals in multiples of 4/5
- network veins
- pollen grain has 3 pores
- vascular bundle is organised in a ring around the stem

Monocots :
- petals in multiples of 3
- parallel veins
- pollen grains with one pore
- vascular bundles randomly present throughout ground tissue

Question 5

Describe and explain the parenchyma

Answer 5

Appearance: thin flexible cell walls
Function: Photosynthesis, storage, secretion, tissue repair.

Question 6

Describe and explain the role of Collenchyma

Answer 6

Definition: a simple tissue composed of living cells, it has unevenly thickened walls (with pectin)

Role: provides flexible support for growing cells

Question 7

Describe and explain the role of Sclerenchyma

Answer 7

Definition: tissue that composed of cells that die when they are mature.

Role: they provide sturdiness because the cell walls still contain a high proportion of lignin and cellulose.

Question 8

Describe and explain epidermis

Answer 8

It is dermal tissue forming the outermost tissue of a young plant

Secretes waxy substances on outward cells to prevent water loss.

In older stems, epidermis is replaced by periderm

Question 9

Describe and explain Xylem

Answer 9

Complex vascular tissue that consists of vessel elements and tracheids.

Both cell types are dead and waterproof.

Question 10

What are the different types of stems

Answer 10

Stolons, Rhizomes, Bulbs, Stem Tubers, Cladodes, Corms

Question 11

What are the different types of stems

Answer 11

Stolons, Rhizomes, Bulbs, Stem Tubers, Cladodes, Corms