Leaves

Question 1

Factors effecting rate of transpiration

Answer 1

• Bright light
• High temps
• high wind
• high humidity (decrease)

Question 2

How does high humidity effect rate of transpiration

Answer 2

Decrease rate
water struggle to leave leaf
higher conc of water outside leaf

Question 3

How does high wind effect rate of transpiration

Answer 3

Increase rate
wind brushes against leaf moving things out way of stoma
rate of diffusion faster

Question 4

How does high temp effect rate of transpiration

Answer 4

Increase rate

increase rate of reaction

Question 5

Describe the environment in which plants with sunken stomata are found and explain how this adaptation helps them to survive

Answer 5

They are found in dry habitats. The sunken stomata trap moist air which reduces diffusion and reduces water loss.

Question 6

Features of a cross section of a leaf

Answer 6

Cuticle
Upper and lower epidermis
Palisade mesophyll 
Spongy mesophyll 
Guard cells and stomata

Question 7

Transport systems in plants

Answer 7

Xylem and phloem

Question 8

Function palisade mesophyll

Answer 8

Photosynthesis

Question 9

Function of cuticle

Answer 9

Waxy layer minimise water loss

Question 10

Function of upper epidermis

Answer 10

Protect

Question 11

describe the role of xylem

Answer 11

transports water through transpiration stream

Question 12

describe the role of phloem

Answer 12

transports sugars using translocation

Question 13

What is transpiration

Answer 13

when plants absorb water through roots