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Introduction :
Along with cell wall in plant cell there are many different cells that have specific function and form tissue. There are three types of cells that form the plant tissues. They function together to provide food production and storage; give flexibility, support, and strength to the plants. Parenchyma is the most flexible and thin cell found in the plants. They are responsible for the structure of plants and have many other function like food storage, gas exchange, photosynthesis, and protection. The next cell is collenchyma; they are cylindrical in shape and give support around the cell. They consist of unevenly thickened cell walls. This cell retain the ability to process cell division ones get matured. The third cell is the sclerenchyma; they are lack of cytoplasm and other living components ones get mature. They have thick and rigid cell wall; they involve in providing support to the cell and also help in transportation of materials within the cell.
Answer to Problem 7A
Correct answer :
The correct answer is option (A).
Explanation of Solution
Explanation/justification for the correct answer :
Option (A) The picture indicates in option A is of parenchyma cell without chloroplast. They are responsible for the structure of plants and have many other function like food storage, gas exchange, photosynthesis, and protection. So, the correct answer is option (A).
Explanation for incorrect answer :
Option (D) The picture given in option D is of trichomes on a leaf. They are hairlike projections found in some of the epidermal cells on leaves. They are involved in the protection of plants from animal and insect predators. So, this is an incorrect option.
Option (B) The picture given in option B is of root cap covers the root tips and loses cells as the root grows through soil. So, this is an incorrect option.
Option (C) The picture given in option C is of epidermal cells. The epidermal cell provides protection to the plants from the environment, found in the epidermis of stem, and leaves, and consist of chloroplast. So, this is an incorrect answer.
Chapter 22 Solutions
Biology Illinois Edition (Glencoe Science)
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