B4 Functions of the parts of the leaf

HideShow resource information
What does the waxy cuticle do?
Restricts water loss from the leaf.
1 of 13
Why is the upper epidermis transparent?
To allow sunlight through to the layer below.
2 of 13
Why are the cells in the palisade layer positioned near the top of the leaf?
To absorb the maximum amount of light.
3 of 13
Why are the cells in the palisade layer packed with chloroplasts?
To absorb the light energy needed for photosynthesis.
4 of 13
What does the spongy mesophyll contain?
Lots of air spaces connected to the stomata.
5 of 13
What does this ensure?
The optimum exchange of gases.
6 of 13
What does the lower epidermis contain?
Most of the stomata.
7 of 13
What do the stomata allow?
The diffusion of gases (eg. CO2 & O2) in and out of the leaf.
8 of 13
What do guard cells control the size of and why?
The stomata to restrict water loss.
9 of 13
What do vascular bundles contain?
Xylem and phloem.
10 of 13
What do these do?
Transport water and sugars through the leaf.
11 of 13
Describe the internal surface area-to-volume ratio of leaves
Leaves have a large internal surface area-to-volume ratio.
12 of 13
What do this improve?
The rate of gaseous exchange between photosynthesising cells and the air spaces.
13 of 13

Other cards in this set

Card 2

Front

Why is the upper epidermis transparent?

Back

To allow sunlight through to the layer below.

Card 3

Front

Why are the cells in the palisade layer positioned near the top of the leaf?

Back

Preview of the front of card 3

Card 4

Front

Why are the cells in the palisade layer packed with chloroplasts?

Back

Preview of the front of card 4

Card 5

Front

What does the spongy mesophyll contain?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Leaves and Photosynthesis resources »