Test: Plant Tissues - Class 9 MCQ

The apical meristem is located at the growing tips of stems and roots and is responsible for the increase in their length. Thus, Option B is the correct answer.

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Lateral meristem, also known as cambium, is responsible for increasing the girth of stems or roots, contributing to the thickening of the plant parts. Therefore, Option B is the correct answer.

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Intercalary meristem is located near the nodes of some plants and contributes to the growth at these points. Option D is correct.

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Meristematic tissue in plants is responsible for producing new cells that facilitate growth. This makes Option B the correct answer.

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Cells produced by meristematic tissue initially are like the meristem itself but eventually differentiate and take on specific roles, forming permanent tissues. Option B accurately describes this process.

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Parenchyma is the most common type of simple permanent tissue found beneath the epidermis in plants, generally involved in storage of food. Thus, Option C is correct.

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Collenchyma tissue provides mechanical support and flexibility to plants, allowing parts like tendrils and stems of climbers to bend without breaking. Therefore, Option B is correct.

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Sclerenchyma tissue, which has thickened lignified walls, makes the plant parts hard and stiff, evident in structures like the husk of a coconut. Option C is the correct answer.

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Guard cells are involved in the gas exchange process in plants as they regulate the opening and closing of stomata, through which gas exchange occurs. Thus, Option C is correct.

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Tracheids and vessels in xylem are tubular structures that primarily transport water and minerals vertically throughout the plant. Option A correctly identifies their function.
 

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Aerenchyma is a specialized type of parenchyma tissue that contains large air cavities, which help aquatic plants float. Therefore, Option B is the answer.

Chlorenchyma, a type of parenchyma that contains chlorophyll, is primarily responsible for photosynthesis. Therefore, Option C is the correct answer.

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The epidermis serves as a protective layer, shielding internal tissues from water loss, mechanical injury, and pathogens. Thus, Option D is correct.

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In older plants, cork forms a protective layer that is impervious to gases and water, effectively serving as an external protective tissue. Option C is correct.

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Sieve tubes, part of the phloem tissue, are responsible for transporting food materials from leaves to other parts of the plant. Therefore, Option B is the correct answer.

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Epidermal cells in the roots often bear long hair-like structures that increase the total absorptive surface area for water and nutrients. Option B is correct.

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Companion cells in phloem assist sieve tubes in the transport of food throughout the plant. Option B accurately describes their role.

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The thick waxy coating on the epidermis of desert plants is to reduce water loss, crucial for survival in arid conditions. Thus, Option C is the correct answer.

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Xylem fibers mainly provide structural support within the plant, helping it maintain rigidity and strength. Therefore, Option C is correct.

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Guard cells regulate the opening and closing of stomata, controlling gas exchange and water evaporation, which are vital for plant survival. Option C accurately identifies their critical function.

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