B2-plant organisation Flashcards
what are the two main transport systems in plants?
xylem and phloem
why do plants have a large surface area?
For maximum absorption of light; for optimum absorption of carbon dioxide
why do plants have a thin flattened blade?
So that water and gases have a limited distance to diffuse
why do plants have vascular tissue?
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
why do plants have air spaces between cells?
for the diffusion of gasses
what layer of the leaf is adapted to absorb light energy?
palisade mesophyll
what is the role of the xylem?
The xylem transports water and minerals from the roots up the plant stem and into the leaves
what is the role of the phloem?
The phloem moves food substances that the plant has produced by photosynthesis to where they are needed for processes such as
what factors effect transpiration?
temperature
humidity
air movement
light intensity
