Stomata are open during the day because this is when photosynthesis typically occurs. The arrangement of cells in a tissue depends on the function to be performed by the tissue. Stomata: Some minute pores which are usually, found in leaf for the exchange of gas and transpiration are known as stomata (singular stoma). Cyclocytic - Here, a minimum of four subsidiary cells surround the guard cell. Q No 5: What are the functions of the stomata? Stomata are found on the leaves of plants. (ii) Exchange of gases (oxygen and carbon dioxide) also takes place through stomata. Types of Stomata 3. Two Main Functions of Stomata . * 80 to 90 percent of transpiration occurs through the stomata. In many plants, stomata remain open during the day and closed at night. The primary stomata function is to take in carbon dioxide and release oxygen, this is done with the assistance of guard cells which voluntarily open and close the pore for the exchange of gases; the process involving gas and water exchange is called transpiration. What are stomata? Functions of stomata: (i) Evaporation of water in plants in the form of vapour takes place through stomata during transpiration. Definition :-Stomata are tiny openings or pores in plant tissue that allow for gas exchange. Answer: The numerous pores under the surface of leaf are called stomata. Functions of stomata-Transpiration(loss of water in the form of water vapours) and; exchange of gases (carbon dioxide and oxygen) are the main functions of stomata. Stomata are tiny pores present on the surface of a leaf. Give two functions of stomata. Top function of Stomata. Each stoma remains surrounded by two kidneys or bean shaped epidermal cells the guard cells. The main functions of stomata includes (i) Helps in transpiration and photosynthesis. Definition of Stomata 2. What is the Function of Stomata? They can either be present on either the sides or just on one side of the leaf. Functions of stomata: (a) Stomata help in the exchange of gases. Vascular Tissues. Animal Stoma. ; The loss of excess water in the form of water vapour. (ii) It allows gaseous exchange between atmosphere and tissues of plants. Transport in Plants Tissue. This process is known as transpiration. Animals also have stomata. Answer: The small pores present on the under-surface plant leaves whose opening are surrounded with guard cells is known as stomata. A tissue is a group of similar cells which work together to perform a particular function. 2) It helps in temperature regulation . The two main functions of stomata are to allow for the uptake of carbon dioxide and to limit the loss of water due to evaporation. Those tissues which transport water, minerals and food to different parts of a plant, are called vascular tissues. Stomata are tiny pores or opening on the surface of a leaf. The stomata may occur on any part of a plant except the roots. ... NCERT Solutions for Class 7 Science. Definition of Stomata: The stomata are minute pores which occur in the epidermis of the plants. Functions of stomata Functions: (i) It helps in the exchange of gases. (b) Evaporation of water from the leaf surface occurs through stomata. Ans: Functions of the stomata: The exchange of gases (CO 2 and O 2) with the atmosphere. It's functions are :- 1) It helps in the gaseous exchange . 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