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To analyze:
The tissue involved in leaves and their functions.
Introduction :
Plants have many different tissues with specific function in different parts. They function together to provide food production and storage; give flexibility, support, and strength to the plants. The plant tissue include meristematic tissue that involve in producing new cells throughout the lives of a plant; dermal tissue that is also considered as epidermis, it form cuticles that help to reduce loss of water. Trichomes are the epidermal cells that are hairlike and produced in leaves and stems. It gives the leaves and stems a fuzzy appearance to provide protection against predators, it also involve in maintaining the optimal temperature keep it cool. Root hairs are another epidermal cells that found in roots, this involve in the increasing the surface area of roots. The next is the vascular tissue involve in the transportation of nutrients, water, and other substances in plants. All the tissue is found in different parts of plants like roots, stems, and leaves.
Explanation of Solution
The leaves of plants are involved in the photosynthesis process and the structures of the leaves are such that it is well adapt to this function. The leaves have a flattened area that is termed as blade, it involves in providing the large surface area. The blades of the leaves are attached to the stem with the help of a stalk that is termed as petiole. There are many tissues that are found in leaves and have particular function.
In the give diagram, A represents the stoma that is bounded by guard cell that is represented in B. They involve in the maintenance of gas exchange process mostly water vapour and carbon dioxide. The label C represents the spongy mesophyll that is found below the palisade mesophyll layer that is represented in D. The palisade mesophyll is the part where most of the photosynthesis takes place as it consists of many chloroplasts and the spongy mesophyll allow the gases to pass through it as it consists of large spaces. The label E represents the cuticles that involve in the transpiration process and avoid the water loss from the plant. F represents the epidermal cell that have trichomes that protects the plant from pathogens.
The diagram given represents the stomata, guard cell, spongy mesophyll, palisade mesophyll, cuticle, and the upper epidermal cell.
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