Life Processes In Plants 🪴 And Animals 🦍

Question 1

1. Functions of stem

Answer 1

Supports Ariel parts of plant.

Question 2

2. Functions of stem

Answer 2

Allows water to move from roots to leaves.

Question 3

3. Functions of stem

Answer 3

3. Allows manufactured food from leaves to move to all parts of the plants.

Question 4

Arrangement of Vascular Tissue in Dicot
Epidermis consists of :

Answer 4

1. Outer ring
2. Cuticle
3. Woody stems

Question 5

Outer ring

Answer 5

Covered by a transparent waxy cuticle.

Question 6

Cuticle

Answer 6

Prevents water loss via transpiration.

Question 7

Woody stems

Answer 7

Epidermis consists of many layers of cells that form the bark.

Question 8

Hypodermis

Answer 8

Sclerenchyma or collenchyma present.
Provides support

Question 9

Arrangement of Vascular tissue in dicot stem:

Answer 9

Epidermis
Hypodermis
Sclerenchyma cap
Vascular bundle
Xylem
Cambium
Phloem
Pith
Cortex

Question 10

Sclerenchyma Cap

Answer 10

Provides support

Question 11

Vascular bundle consists of:

Answer 11

Sclerenchyma
Phloem
Cambium
Xylem

Question 12

Sclerenchyma cap in vascular bundle

Answer 12

Provides support

Question 13

Phloem

Answer 13

Transports food

Question 14

Cambium

Answer 14

Between phloem and xylem

Question 15

Xylem

Answer 15

Transports water and mineral salts

Question 16

Pith

Answer 16

1. Thin walled parenchyma cells.
2. Found towards centre of stem.
3. Stores starch.

Question 17

Cortex consists of

Answer 17

Thin walled parenchyma cells.
Dicotyledonous.
Scelerenchyma

Question 18

Thin walled parenchyma cells

Answer 18

Provide support stem when they are turgid.

Question 19

Dicotyledonous

Answer 19

Outer cortex form hypodermis which is made up of collenchyma and scelerenchyma cells.

Question 20

Collenchyma

Answer 20

Walls thickened at corners

Question 21

Sclerenchyma

Answer 21

Evenly thickened wall.

Question 22

Secondary growth in dicotyledonous stems

Answer 22

Refers to increase in the thickness ( girth ) of a plant as it gets older.

Question 23

1. Secondary xylem and Secondary phloem.

Answer 23

Secondary thickening in a dicotyledonous stem results from the development of a Circular layer of cambium cells that forms between xylem and phloem.

Question 24

2. Secondary xylem and Secondary phloem.

Answer 24

Between vascular bundles in line with the vascular Cambium, found in parenchyma cells. Cells become meristematic and undergo repeated mitosis.

Question 25

3. Secondary xylem and Secondary phloem

Answer 25

Ring of cambium cells produce Secondary xylem.

Question 26

Annual rings

Answer 26

Each year a new ring of secondary xylem forms which is referred to as annual ring.

Question 27

Woody stems

Answer 27

Annual rings are visible when a tree trunk is cut .

Question 28

2. Annual rings

Answer 28

Each ring represents one year

Question 29

Thick annual ring

Answer 29

Indicates the water was plentiful.

Question 30

Thin annual ring

Answer 30

Indicates that the plant experienced a relatively dry year.

Question 31

Cork formation

Answer 31

Cork cells develop towards the outer surface of a dicotyledonous stem.

Question 32

Cork cells replace?

Answer 32

Replace cortex and epidermis with bark which protects vascutissue of stem.

Question 33

Suberin

Answer 33

Oily substance that prevents water loss from stem.

Question 34

Lenticels

Answer 34

Tiny openings in stems surface allow for exchange of gases between stem and atmosphere.

Question 35

Plants absorb?

Answer 35

Plants absorb water and mineral salts from soil via roots.

Question 36

Xylem tissue

Answer 36

Transports water and mineral salts through the roots , stems and leaves.

Question 37

Manufactured food during photosynthesis

Answer 37

Transported to all parts of the plant via the phloem tissue.

Question 38

Xylem tissue ..

Answer 38

1. Xylem Vessels
2. Xylem trachieds

Question 39

1. Function of xylem tissue

Answer 39

Transports absorbed water and mineral salts from roots to stems and leaves.

Question 40

2. Function if xylem tissue

Answer 40

Gives plants strength

Question 41

Lignin

Answer 41

Strengthens xylem tissue