Give three reasons in support of the statement. Question 5: State the functions of guard cells. Question 38. 2)The stomata allow for the loss of excess water in the form of water vapour, which also allows for cooling. ... State the role of saliva in the digestion of food. Write functions of guard cells. NCERT Solutions for Class 10 Science Chapter 6 Life Processes all intext question and exercises answers in PDF Hindi and English 2020-21. Q6. ... 4.0.4 Explain the structure of stomata. The epidermis is made up of single layer of cells. (ii)Transpiration in plants takes place through stomata. What is placenta? (a) (b) Two functions of stomata are: (i) Exchange of gases between the plant and the atmosphere takes place through stomata. Explain why leaf is preferred for preparation of temporary mount to show stomata. (a) Draw a labeled diagram of stomata. Top function of Stomata. * The number of stomata on a plant leaf/organ is highly dependent on the type of plant as well as its habitat. (CCE 2015) Answer: Functions of Guard Cells : Opening and closing of stomata. Epidermis on the aerial parts of the plants often secrete a waxy, water-resistant layer on their outer surface. All over the plant body epidermis is present. Q4. State two functions of stomata. Allowing exchange of gases and transpiration. Q7. State its functions in case of pregnant human female. Functions of stomata: 1. (c) Opening and Closing of Stomatal Pore: The opening and closing of the pore is a function … Definition of Stomata: The stomata are minute pores which occur in the epidermis of the plants. 2. Give two ‘reasons for the appearance of variations among the progeny formed by sexual reproduction. Each stoma remains surrounded by two kidneys or bean shaped epidermal cells the guard cells. These pores are called stomata. It helps in the transpiration of water, i.e., the loss of excess water from the plant. Types of Stomata 3. Name the epidermal cells surrounding the guard cells. These openings are surrounded with guard cells. Biology Practicals For Class 10 CBSE. Q5. Describe its structure. The stomatal pore is guarded by two kidney shaped guard cells. The two main uses are: 1)The stomata is responsible for the interchange of gases for respiration and photosynthesis. (ii)Transpiration in plants takes place through stomata. (b) State the conditions necessary for photosynthesis and give its chemical equation. (c) How do guard cells regulate the opening and closing of stomatal pore? The stomata may occur on any part of a plant except the roots. 3. (b) Two functions of stomata are: (i) Exchange of gases between the plant and the atmosphere takes place through stomata. Write any two functions of it. Ultrastructure of Guard Cells In different types of plants, guard cells have been shown to contain varying amounts of the typical cell organelles (among other structures) with some unique characteristics. Answer. [CBSE 2012] Answer: (a) Open stomatal (b) (i) It helps in the exchange of gases like carbon dioxide and oxygen as per the requirement for the photosynthesis and respiration of … NCERT Class 10 Science Lab Manual – Stomata. (CCE 2015) Answer: (b) State two functions of stomata. Stomata Experiment Class 10 Introduction. Reproduction is one of the most important characteristics of living beings. Loss of water from the stomata creates an upward pull, i.e., suction pull which helps in absorption of water from the roots. This is how the two processes are interrelated. Explain the mechanism of closing and opening of stomata. Name the category of plants which keep their stomata open during the night and closed during the day. State any two functions of the cells that surround the stomata. (c) How do guard cells regulate the opening and closing of stomatal pore? Definition of Stomata 2. (b) State two functions of stomata. 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