1.2) Tissues

Question 1

Tissues:

Answer 1

a group of cells that work together for the same function

Question 2

5 main types of plant tissues

Answer 2

1) Epidermis
2) Parenchyma
3) Collenchyma and Sclerencyma
4) Xylem and Phloem
5) Meristematic tissue

Question 3

Epidermis (location)

Answer 3

covers the surface of the plant

Question 4

Epidermis ( structure)

Answer 4

single layer cells ,no inter cellular air space,usually
square shaped and have a thick outer wall to protect
plants from damage

Question 5

Epidermis ( function)

Answer 5

produces a layer of waxy,waterproof material,called the cuticle, which prevents water loss

Question 6

Special epidermis :

Answer 6

Guard cells: allows gases to enter and exit the leaf and the epidermal cells that contain chloroplast

Question 7

Location of special epidermis

Answer 7

found in the epidermis mainly on the underside of leaves

Question 8

Stomata

Answer 8

surround the small openings in the epidermis

Question 9

Gases that enter and exit through the stomata

Answer 9

oxygen,carbon dioxide and water vapour

Question 10

Parenchyma (location)

Answer 10

found below the epidermis

Question 11

Parenchyma (structure)

Answer 11

the cells are round and rough, have the thin walls ,act as packing tissue between the epidermis and conducting tissues

Question 12

Parenchyma (function)

Answer 12

the thin walls allow the movement of water and salts through the plant
the large vacuoles store food and water
the large inter cellular air spaces allow gaseous to take place in the internal parts of the plant

Question 13

specialized parenchyma

Answer 13

cholorenchyma, cells that contain chloroplast ,found in the stems and leaves

Question 14

Collenchyma

Answer 14

found under the epidermis

Question 15

Collenchyma (structure)

Answer 15

cell walls of the collenchyma are thickened with cellulose . No inter cellular spaces

Question 16

Collenchyma (function)

Answer 16

In some plants such as celery, collenchyma forms strengthening ridges, provides support in stems and leaf stalks ,its flexible

Question 17

Sclerenchyma

Answer 17

found in stems and roots and also in fruits and shells of nuts

Question 18

Sclerenchyma (structure)

Answer 18

have thick walls that contain a substances called lignin as wells as cellulose.

Question 19

Sclerenchyma (functions)

Answer 19

the lignin makes the cells walls of scelrenchyma waterproof , the thickened cell walls provide strength and support stems and roots . the cells contents die so its an non living plant tissue

Question 20

Stone cells

Answer 20

small,round and hard, they give some fruits a gritty texture. found in the flesh e.g,strawberries or pears

Question 21

Sclerenchyma fibers

Answer 21

long with thickened walls, which makes stems and roots tough and rigid

Question 22

Xylem

Answer 22

transports water and minerals salts from roots to parts of the plants

Question 23

two types of Xylem cells

Answer 23

trachieds and vessels

Question 24

trachieds

Answer 24

cells with overlapping ends that transport water in the plants

Question 25

Vessels

Answer 25

cells joined end to end that transport water to the plants

Question 26

Phloem

Answer 26

transport food the from the leaves to other parts of the plants

Question 27

two types of Phloem cells

Answer 27

sieve tubes and companion cells

Question 28

sieve tubes

Answer 28

transport food ,the ends of the tubes are called sieve plates

Question 29

companion cells

Answer 29

small cells found next to the sieve tube,contain nuclei and controls the functions of the sieve tubes.

Question 30

Meristematic tissue

Answer 30

M for mitosis . responsible for the growth in plants ,makes roots and stems grow longer and wider by the process of cell division