(a) In the diagram of meristematic tissue in the plant body given here, identify the type of meristematic tissue found in the regions marked ‘A’ and ‘B’ of a stem, (b) Aerenchyma, that stores gases, provides buoyancy to aquatic plants and help them float over water. Answer: The tissue is xylem parenchyma. The term used to describe larger-sized intracellular air spaces such as those found in elodea is aerenchyma. (a) Aerenchyma is found in aquatic plants (Vallisneria, Hydrilla), but Opuntia is a xerophytic plant. The role of aerenchyma in gas-phase carbon concentration: details of the unusual pathway. (b) Biome is total sum of all ecosystem present in the planet earth whereas age pyramid ts the graphical representation of age of organisms of one population at a specific time. In terms of shape, they are classified to be isodiametric. 3. This is a question and answer forum for students, teachers and general visitors for exchanging articles, answers and notes. Name the type of plant tissue found in the following: a) Root apex b) Aquatic plants for providing buoyancy c)Coconut husk Aerenchyma is the term given to plant tissues containing enlarged gas spaces exceeding those commonly found as intracellular spaces. The plants become buoyant due to the presence of air and also gaseous exchange is facilitated. ... Aerenchyma is parenchyma with large air pockets. Question 4. Question 24. 4. … Answer:b)Aerenchyma c)Sclerenchyma a)parenchyma Q12. Until the 1980s, CAM was considered primarily an adaptation to physiologic drought: it allows plants to open their stomata during the night, when water loss is minimized, and accumulate atmospheric carbon in 4-carbon acids (malate or aspartate) that are then converted to carbohydrates during the … In hydrophytes large air cavities are formed in between cells of these tissues, which are fil­led with air. Answer Now and help others. The channels of air filled cavities provide a low resistance internal pathway for the exchange of gases, such as oxygen and ethylene between the plant above the water and the submerged tissues. Make up the cortex and pith of roots, and form the palisade mesophyll and spongy mesophyll. Identify the type of tissue. Aerenchyma provides aquatic plants with the means to transport light-converted oxygen to their roots. Aerenchyma helps the leaves of lotus plant to float on water. Aerenchyma is the spaces or air channels in the leaves, stems and roots of some plants, which allows exchange of gases between the shoot and the root. Structure of Parenchyma Cell in Plants (Image Source: Wikimedia) Plant parenchyma cells are believed to be the precursor of differentiated and specialized cells and tissues. Which of the following is a meristematic tissue?-Periderm-Cork cambium-Epidermis-Collenchyma ... -Aerenchyma. This keeps the parts of the plant that are submerged happy! They are the most common cells in a plant and are found in fruit, stems, fruit, seeds. Vessels have perforated end walls, tracheids do not. Aerenchyma has large cavities to provide buoyancy to the parts of aquatic plants. Question 5. Cattails have something called aerenchyma in their leaves, stems, and roots. Aerenchyma are basically open spaces that allow oxygen to travel from the air, to the leaves and shoots, and down to the roots and rhizomes (underground root-like stems) that are underwater. It is formed in the roots and shoots of wetland species and in some dryland species in adverse conditions, either constitutively or because of abiotic stress. This types of parenchymatous tissue is called aerenchyma. A tissue present in plants helps in storing food and sideways conduction of water. 2. The parenchyma is the simplest among the three types of plant cells because they only have a very thin layer of cell walls.. 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