B2-plant organisation

Question 1

what are the two main transport systems in plants?

Answer 1

xylem and phloem

Question 2

why do plants have a large surface area?

Answer 2

For maximum absorption of light; for optimum absorption of carbon dioxide

Question 3

why do plants have a thin flattened blade?

Answer 3

So that water and gases have a limited distance to diffuse

Question 4

why do plants have vascular tissue?

Answer 4

Branches of the xylem, to transport water and minerals to the leaf; branches of the phloem, to transport glucose and other products of photosynthesis to other parts of the plant

Question 5

why do plants have air spaces between cells?

Answer 5

for the diffusion of gasses

Question 6

what layer of the leaf is adapted to absorb light energy?

Answer 6

palisade mesophyll

Question 7

what is the role of the xylem?

Answer 7

The xylem transports water and minerals from the roots up the plant stem and into the leaves

Question 8

what is the role of the phloem?

Answer 8

The phloem moves food substances that the plant has produced by photosynthesis to where they are needed for processes such as

Question 9

what factors effect transpiration?

Answer 9

temperature
humidity
air movement
light intensity