Plant tissues

Question 1

Type of tissue and observable features

Answer 1

Parenchyma

• rounded sides
• thin walled cells
• loosely packed

Question 2

Type of tissue and observable features

Answer 2

Sclerechyma

• cell walls evenly thickened with lignin

Question 3

Type of tissue and observable features

Answer 3

Phloem

• elongated sieve tubes
• companion cells
• perforated sieve plates

Question 4

Type of tissue and observable features

Answer 4

Meristematic tissue

• Tightly packed
• large nuclei
• small or no vacuole

Question 5

Type of tissue and observable features

Answer 5

Collenchyma

• cells tightly packed (no aispaces)
• cell walls thickened in corners

Question 6

Type of tissue and observable features

Answer 6

Xylem vessel

• Spiral secondary thickening (lignin)
• Tube shaped

Question 7

Type of tissue and observable features

Answer 7

Leaf epidermis

• Tightly packed
• Single layer
• waxy cuticle

Question 8

Type of tissue and observable features

Answer 8

Chlorenchyma (spongy mesophyll)

• large airspaces
• thin cell walls
• chloroplasts

Question 9

Type of tissue and observable features

Answer 9

Epidemal

• tightly packed cells
• stoma (guard cells and pores)
• no chloroplasts

Question 10

Type of tissue and observable features

Answer 10

Parenchyma

• many sided/rounded cells
• thin walled cells
• loosely packed, large airspaces

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Question 11

Type of tissue and observable features

Answer 11

Xylem vessels

• wide tubes
• thickened cell walls (lignin)

Question 12

Type of tissue and observable features

Answer 12

Xylem (tracheids)

• long tapered cells
• thickened lignin walls with pores

Question 13

Type of tissue and observable features

Answer 13

Epidermis (root hairs)

• Long projections of cytoplasm
• thin cell walls
• tightly packed

Question 14

Function of meristematic tissue

Answer 14

• For plant growth
• Initially undifferentiated
• Make new cells

Question 15

Function of sclerenchyma

Answer 15

• lignin thickening strong
• Provides structure
• support of various regions of the plant

Question 16

Function of parenchyma

Answer 16

• Store food and water
• Allow gas diffusion
• Allow water movement
• Packing tissue (some degree of support)

Question 17

Function of Chlorenchyma

Answer 17

• makes up mesophyll in leaf
• photosynthesis (chloroplasts)
• Spongy mesophyll allows movement of gases

Question 18

Function of collenchyma

Answer 18

• Flexible support

Question 19

Function of epidermal guard cells

Answer 19

• Open or close pores (stoma)
• control entry and exit of gases

Question 20

Function of epidermal root hairs

Answer 20

• Increased surface area of root
• Increased water and mineral uptake

Question 21

Function of epidermal cells

Answer 21

• Protective skin
• Clear to let light through
• Prevents infection (cuticle)
• Prevents waterloss (cuticle)

Question 22

Function of phloem sieve tubes

Answer 22

• Transport manafacture organic food
• From source to sink e.g. leaves to other tissues

Question 23

Function of phloem companion cells

Answer 23

• Keep sieve tube cells alive
• Regulate sieve tube functioning

Question 24

Functions of xylem tracheids

Answer 24

• Lateral water and mineral transport
• Strength and support

Question 25

Functions of xylem vessels

Answer 25

• Transport water and disolved minerals
• ‘big pipes’
• Unidirectional movement from roots up stem to leaves

Question 26

Type of tissue and observable features

Answer 26

Parenchyma

• large airspaces
• rounded cells
• loosely packed

Question 27

Type of tissue and observable features

Answer 27

Sclerenchyma

• Cell walls evenly thickened by lignin

Question 28

Type of tissue and observable features

Answer 28

Meristematic tissue

• Tightly packed
• large nuclei
• small or no vacuole

Question 29

Type of tissue and observable features

Answer 29

Sclerenchyma

• long fibres
• Cells evenly thickened with lignin

Question 30

Type of tissue and observable features

Answer 30

Collenchyma

• cells tightly packed (no aispaces)
• cell walls thickened in corners

Question 31

Type of tissue and observable features

Answer 31

Different xylem vessels

• Spiral, pitted and annular secondary thickening (lignin)
• Tube shaped

Question 32

Type of tissue and observable features

Answer 32

Phloem

• elongated sieve tubes
• companion cells
• perforated sieve plates