which material play a impotant role in transportation of water in plant give reason for following: - a:-why is diffusion not sufficent to most oxygen required met of all cell in multi cellular organisms b:-how desert plant perform their photosynthesis?
Answers
Explanation:
Xylem and phloem are important for transportation of materials in plants because xylem transports water and minerals from the roots towards the stems, leaves and flowers, whereas phloem transports prepared food from the leaves towards the other parts of the plant.
( A ) :- Diffusion is insufficient to meet the oxygen requirement of multicellular organisms like human because all the cells are not direct contact in environment and diffusion is a slow process. Diffusion is too slow to cover the distance between the gas exchange surface and the sites where the oxygen is required.
( B ) :- In desert plants, the stomata is open during night. During night, desert plants absorb carbon dioxide and form an intermediate. Then during day time when the stomata is closed to prevent loss of water, they use this stored carbon dioxide to perform photosynthesis.
HOPE IT'S HELP YOU