Plant Nutrition

Question 1

Protects the leaf and is secreted by the cells of the upper epidermis.

Answer 1

Waxy Cuticle

Question 2

Thin and transparent to allow light to pass through. Acts as a barrier to disease organisms.

Answer 2

Upper epidermis

Question 3

Main region for photosynthesis, column cells packed with chloroplast.

Answer 3

Palisade mesophyll

Question 4

More spherical and loosely packed than the palisade mesophyll. Air space between them allows for gaseous exchange.

Answer 4

Spongy mesophyll

Question 5

Acts as a protective layer, contains various stomata for gaseous exchange.

Answer 5

Lower epidermis

Question 6

Responsible for opening and closing the stomata, contains chloroplast.

Answer 6

Guard cells

Question 7

Pour which allows for gaseous exchange and prevents water vapour loss.

Answer 7

Stomata

Question 8

Brings water and minerals to the leaf.

Answer 8

Xylem vessels

Question 9

Translocates glucose from source to sink

Answer 9

Phloem vessels

Question 10

Leaf vein, transports material throughout the leaf.

Answer 10

Vascular bundle

Question 11

6 limiting factors of photosynthesis

Answer 11

i) Heat
ii) pH
iii) Light Intensity
iv) Amount of CO2
v) Amount of H2O
vi) Amount of Chlorophyll

Question 12

Limiting factor:

Answer 12

A factor that limits the rate of reaction when there are various factors affecting the reaction. Assuming that all the other factors are at a constant level.

Question 13

Do plants absorb green light?

Answer 13

No. Chlorophyll is green so plants reflect green light.