Manik saw his father watering his garden plants in hot weather. He noticed
that water doesn’t stick to the plant leaves and leaves become dry but looked
fresh. When he went to school next day, he asked following questions to his teacher.
a. Why does water not stick to the leaves?
b. How does this water get inside the plant?
c. Explain the tissues responsible for transportation of food and water in
plants.
Answers
Answer:
a.water doesn't stick to the leaves because there is a waxy coating layer in the surface of the leaf.
b.normally the water gets inside the plant throw roots. Roots observes the water from the soil and passes to all the parts of the tree.
c.Plants have tissues to transport water, nutrients and minerals. Xylem transports water and mineral salts from the roots up to other parts of the plant, while phloem transports sucrose and amino acids between the leaves and other parts of the plant. This is how tissues are responsible for transportation of food and water in plants.
Explanation:
The answers to the questions are -
a. The water does not stick to leaves due to the presence of a waxy layer. This waxy layer is called the cuticle and prevents the loss of water from evaporation.
b. The water reaches inside the plant through absorption by root hair. Root hair absorbs water present in the soil.
c. Transportation of food occurs from leaves to different parts through the phloem. Flow is bidirectional in nature. For the transport of water, the xylem is responsible. Water absorbed through the root reaches the top of the plant in a unidirectional way.