Plants

Question 1

What is the outer layer of the top of a leaf called?

Answer 1

Waxy cuticle

Question 2

What is the first layer of thin tissue in a leaf called?

Answer 2

Epidermal tissue

Question 3

What is the section in the middle of a leaf with two distinct layers?

one ‘fence’ like and the other airy

Answer 3

Palisade mesophyll tissue
•Lots of chloroplasts

Spongy mesophyll tissue
•Air space for increased rate of diffusion

Question 4

What is the final layer at the bottom of a leaf?

Answer 4

Epidermal tissue
• home for the stomata and there guard cells

Question 5

What is transpiration?

Answer 5

The loss of water from the plant
Diffusion and evaporation from the leaves

Question 6

What 4 factors effect transpiration?
Rate of transpiration

Answer 6

Positive correlation
Light intensity (brighter)
Temperature (warmer)
Air flow
Humidity (drier)

Question 7

What are magnesium ions needed for in a plant?

Answer 7

For making chlorophyll
• a Lack of these ions results in discolouration in the leaves (chlorosis)

Question 8

What do plants need nitrates for?

Answer 8

To make proteins Therefore for growth
Not enough = stunted growth

Question 9

Limiting factors on the rate of photosynthesis can be:

Answer 9

Light
Temperature
Amount of CO2
Amount of chlorophyll