LESSON 2

Question 1

composed of outer covering of the plant

Answer 1

Dermal Tissue system

Question 2

• Are external skin layer of the plant which extend all over the entire surface of body.
• Consisting single layer flattened cells

Answer 2

Epidermis

Question 3

These are the flattened cells that can be seen in epidermis

Answer 3

Straight Walled
Wavey Walled
Beaded Walled

Question 4

Functions of Epidermis

Answer 4

1. Protection of internal tissue from mechanical injuries
2. Prevention of excessive evaporation of water
3. Protects them from excessive radiation of heat from the sun
4. It acts as store house of water.
5. It has minor function in photosyntheis and secretion

Question 5

Structures found in Epidermis layer

Answer 5

Stomata
Trichomes

Question 6

Functions of stomata

Answer 6

they perform gaseous exchange and transpiration

Question 7

Types of Stomata arrangement

Answer 7

1. Diacytic (caryophylaceous)
2. Anisocytic (cruciferous)
3. Anomocytic (irregular)
   5.Paracytic (parallel)
4. Actinocytic (radiated)

Question 8

accompanied by 2 subsidiary cells

Answer 8

Diacytic

Question 9

there is an equal cells accompanied by 3 subsidiary cells.

Answer 9

Anisocytic

Question 10

stoma is surrounded by varying number of subsidiary cells.

Answer 10

Anomocytic

Question 11

stoma is surrounded by 2 subsidiary cells the long access of which are parallel to that of the stoma.

Answer 11

Paracytic

Question 12

the stoma is surrounded by circles of radiating cells.

Answer 12

Actinocytic

Question 13

2 types of dermal tissue system

Answer 13

Epidermis
Periderm

Question 14

they are manute openings usually found in epidermis of the leaves, flowers and fruits of the plants.

Answer 14

Stomata

Question 15

they are elongated out growth of one or more epidermal cells found on the leaves sometimes on the stems for protection.

Answer 15

Trichomes

Question 16

Functions of trichomes

Answer 16

to prevent the clogging of the stomata due to dust accumulation

Question 17

Types of Trichomes

Answer 17

Clothing hairs
Glandular trichomes

Question 18

this is the layer immediate below epidermis it consist of 3 kinds of cells _____, _____, and ______.

Answer 18

Periderm
Phellen cells
Phellogen cells
Phelloderm cells

Question 19

they are consist of vascular bundles which are distributed in the stele, and the central cylinder of the stem surrounded by the epidermis and each bundle is made up of _______ and ______.

Answer 19

Vascular Tissue System
Xylem and Phloem

Question 20

made up of xylem, phloem and cambium

Answer 20

stele

Question 21

represented by the cortex, hypodermis, pith, mesophyll, portion of the midrid of the leaves

Answer 21

Ground Tissue System

Question 22

ground tissue system is made up of:

Answer 22

Parenchyma
Collenchyma
Scelerenchyma

Question 23

this is a collection of cells whose main function is for storage of food materials

Answer 23

parenchyma

Question 24

storage of air inside the parenchyma

Answer 24

aerenchyma

Question 25

- flexible in nature it gives stencil strength to the growing organs in being extensible - use to manufacture sugar and starch.

Answer 25

collenchyma

Question 26

- consist of very long narrow thick lignified cells usually pointed at both ends. - they give strength, rigidity, flexibility, and elasticity to the plant body enabling them to withstand various strains.

Answer 26

sclerenchyma

Question 27

cell content found in plants:

Answer 27

starch protein cacium oxalate crystals mucilage

Question 28

they are polysaccharides containing amylopectin and the meta amylose

Answer 28

starch

Question 29

responsible for viscosity of starch

Answer 29

amylopectin

Question 30

they are usually found abundantly in the endosperm of most seeds.

Answer 30

protein

Question 31

they are excretory products of plant metabolism

Answer 31

calcium oxalate crystals

Question 32

these are the polysaccharides complexes of sugar and uronic acid usually formed from the cell walls of the plants

Answer 32

mucilage

Question 33

function of xylem and phloem

Answer 33

Xylem transports and stores water and water-soluble nutrients in vascular plants. Phloem is responsible for transporting sugars, proteins, and other organic molecules in plants