Photosynthesis in green plants is directly and
indirectly dependent on so many plant structures.
Explain briefly the role of the following structures
in this process.
(a) Guard cells ......
(b) Cuticle ..........
(c) Chlorophyll
(d) Stomata
(e) Xylem tissue in the leaf veins
(f) Phloem tissue in the leaf veins
Answers
Answer:
a)Plants 'breathe' and 'sweat' through their stomata, which are regulated by guard cells. Guard cells have a very important job because by opening and closing stomata, they facilitate gas exchange for photosynthesis and help minimize water loss
b)
The cuticle also works with the stomata to help complete photosynthesis. After the stomata open and carbon dioxide enters the leaf, the cuticle protects the mesophyll layer, which contains the photosynthetic cells that receive and process the carbon dioxide to manufacture glucose.
c)Chlorophyll's job in a plant is to absorb light—usually sunlight. The energy absorbed from light is transferred to two kinds of energy-storing molecules. Through photosynthesis, the plant uses the stored energy to convert carbon dioxide (absorbed from the air) and water into glucose, a type of sugar.
d)the gas exchange that occurs when stomata are open facilitates photosynthesis. Photosynthesis is the process by which plants convert sunlight into usable energy. During photosynthesis, carbon dioxide is taken in from the atmosphere through the stomata and oxygen is released as a waste product
e)Each plant contains a branched system of tubes called xylem, which is responsible for water transport from the roots (where it is taken up) to the leaves (where it is used in photosynthesis). Water flows up from the roots, through the trunk and branches, to the leaves, where it is used in photosynthesis
f)Water flows up from the roots, through the trunk and branches, to the leaves, where it is used in photosynthesis. Alongside xylem is another system of tubes called phloem, which transports the glucose formed in photosynthesis into the branches, fruit, trunk and roots of the tree