Plant Tissues

Question 1

Epidermal in stems /leaves

Structure

Answer 1

-have no intercellular air spaces , they are tightly packed
-cells which surround a pore are kidney shaped with a chloroplast (guard cells)
-the tissue is covered by a cuticle

Question 2

Epidermal structure , in roots

Answer 2

-no cuticle present

-some epidermal cells which are modified into hair cells ,have an elongated extension

Question 3

Parenchyma structure

Answer 3

-thin cell wall
-large vacuole
-intercellular air spaces
-round to oval shape

Question 4

Collenchyma structure

Answer 4

-Similar to parenchyma
-Dif:walls are evenly thickened
-Walls thicker at angles when viewed in transverse section

Question 5

Sclerenchyma

Answer 5

-have ,evenly thickened walls impregnated with lignin
-cell wall have no cell contents

Question 6

Xylem structure (vessels

Answer 6

-consist of dead cells
-elongated, hollow cells joined end to end to form continuous tubes
-walls lignified with incomplete thickening
-cross walls are also perforated or absorbent to allow for rapid movement of water

Question 7

Xylem structure (trancheid

Answer 7

-Consist of dead cells
-Long and tapered at both ends
-Walls with lignified pits

Question 8

Phloem structure (sieve tubes

Answer 8

-elongated ,hollow cells joined end to end
-holes called pits are found on the end walls forming sieve plates
-no nucleus present

Question 9

Phloem structure (companion cells

Answer 9

-found next to a sieve tube
-has a large nucleus

Question 10

Tissue

Answer 10

A group of similar cells with a similar function

Question 11

Parenchyma function

Answer 11

-acts as a package for tissue

-stores water, sugar and starch

-intercellular aid spaces allow water and gasses to pass through the tissue

Question 12

Collenchyma

Answer 12

Acts as a supporting tissue especially in young stems and leaves

Question 13

Sclerenchyma

Answer 13

Provide mechanical support

Question 14

Epidermal function

Answer 14

Protects the inner tissue in Plant

In leaves /stems
-cuticle restricts water loss by evaporation
-stomata and lenticels allow for gases to enter and leave plant

Roots
-root hair cells increase surface area to increase water absorption from the soil

Question 15

Phloem function

Answer 15

-transports food from leaves to all parts of the plant
-food moves in both directions in sieve tube
-a companion cell controls the functioning of a sieve tube element

Question 16

Xylem function

Answer 16

-transport absorbed water and mineral salts from the roots to the stem and leaves

-gives plants energy