Plant Nutrition - Parts Of The Leaf

Question 1

Upper Epidermis :

Answer 1

Protection
No chloroplasts
Absorbs harmful light but allows light for photosynthesis to pass through

Question 2

Palisade Cell:

Answer 2

Tightly packed, elongated cells
Lots of chloroplasts
Higher rates of photosynthesis

Question 3

Waxy cuticle:

Answer 3

Waterproof
Reduces water loss
Reduces infection by fungi and bacteria

Question 4

Spongy Cells :

Answer 4

Loosely packed with air spaces between cells
Some chloroplast
Some photosynthesis

Question 5

Air Spaces :

Answer 5

Between spongy cells

Provide air channels through leaf allowing gas exchange

Question 6

Xylem :

Answer 6

Rigid vessel in lignin

Carries water and minerals to from the roots to the stem and the leaves

Question 7

Phloem :

Answer 7

Vessels of living cells
Sieve tube cells form vessels
Carry dissolved sugar around plants to places where the glucose is used and stored as starch

Question 8

Guard Cells :

Answer 8

Guard cells change in shape depending on the amount of water inside
Controls opening and closing of stomata (pores on the underside of leaves)

Question 9

Stomata :

Answer 9

Space between the guard cells

Controls gas exchange (movement oxygen of carbon dioxide) and water loss form leaf