Answer: (i) The guard cells are located in the leaves. Hairs on leaves: Hairs trap a small layer of water vapour that works in three ways to reduce transpiration: Creates a pocket of moist air to reduce the water potential gradient. Study the same and answer the questions which follow: (i) Identify the stage of cell division. Ask your question. of water at the surfaces of the spongy mesophyll cells in leaves, followed by loss of water vapour through the stomata. the cuticle. (False. Increases the sheen on leaves to make them more reflective. Hence, ... Evergreen trees develop a thick waxy cuticle on the epidermis of leaf. Answer the questions which follow: (i) Name the parts labelled A. Distribution of water is throughout the plant. Leaves are adapted to perform their function, eg they have a. (iii) Wind velocity has an effect on transpiration. Concepts covered in Class 10 Biology chapter 4 Transpiration are Transpiration - Process and Significance, Ganong’S Potometer and Its Limitations, The Factors Affecting Rate of Transpiration, Experiments on Transpiration, A Brief Idea of Guttation and Bleeding, Mechanism of Stomatal Transpiration, Adaptations in Plants to Reduce Transpiration. The internal structure of the leaf is also adapted to promote efficient photosynthesis. to allow carbon dioxide into the leaf and oxygen out. (iv) Mention two structural features of A which help in the function mentioned in (iii) above. A few plants have their leaves modified into needle-like structures known as spines. To allow more light to reach the palisade cells, To protect the leaf from infection and prevent water loss without blocking out light, To absorb more light and increase the rate of photosynthesis, Air spaces allow gases to diffuse through the leaf, When a plant is carrying out photosynthesis carbon dioxide needs to move from the air into the leaf. Desert plants have specially adapted structures, such as thick cuticles, reduced leaf areas, sunken stomata and hairs to reduce transpiration and conserve water. Sacculus and utriculus are responsible for static equilibrium.2. (ii) Give the name of the surgical method represented in the diagram. The waxy deposits can be thin or thick, depending… Plant becomes cool all the time. 13. The pH of the guard cells increases during day time. It also helps maintain the temperature of the surrounding region. To reduce water loss the leaf is coated in a waxy cuticle to stop the water vapour escaping through the epidermis. Study the same and answer the questions which follow: (i) Name the parts marked A. More transpiration occurs from the under surface of a leaf.) In general, xerophytic plants which are adapted to dry, hot climates have thick cuticles than those which are adapted to cool, moist climates. Transpiration takes place only in green plants. Leaves are adapted in several ways to help them perform their functions. I’ll list the advantages of this process to plants below. (i) A - Semicircular canalB - UtriculusC- SacculusD- Cochlea(ii) Optic nerve(iii)1. (iii) The amniotic fluid forms a cushion around the embryo and protects it from jerks and acts as a shock absorber. 1. ... 1. anatomical defenses (thorns, spines, thick bark), 2. sticky traps (pitch), 3. toxins. It causes around 20% of transpiration in plants. Some substances are transported to upper regions of the plant. (a) The diagram below represents a stage of a cell division. (iv) Tubectomy is conducted in females. 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