Structural Organisation – Anatomy of Flowering Plants Quiz - ICSE Class 11 Biology

Free practice quiz: Structural Organisation – Anatomy of Flowering Plants (ICSE Class 11 Biology). 37 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

Sample questions

1. Which of the following vascular tissues is primarily responsible for the unidirectional upward transport of water and dissolved minerals from the roots to the aerial parts of a plant?

   1. Phloem
   2. Xylem
   3. Cambium
   4. Epidermis
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   Answer: B. Xylem

   Xylem is the vascular tissue in plants that conducts water and dissolved nutrients upward from the root and also helps to support the plant structurally. Phloem, on the other hand, transports sugars produced during photosynthesis.

2. The tissue responsible for primary growth in length at the root apex is the:

   1. Apical meristem
   2. Lateral meristem
   3. Intercalary meristem
   4. Procambium
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   Answer: A. Apical meristem

   Apical meristems are regions of actively dividing cells located at the tips of shoots and roots. They are responsible for primary growth, which leads to an increase in length.

3. The opening and closing of stomata are regulated by changes in the turgor pressure of:

   1. Epidermal cells
   2. Guard cells
   3. Mesophyll cells
   4. Subsidiary cells
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   Answer: B. Guard cells

   Guard cells are specialized epidermal cells that surround the stomatal pore. Changes in their turgor pressure, influenced by factors like light intensity and CO2 concentration, cause the stomata to open or close, controlling gas exchange and transpiration.

4. The presence of vessel elements with perforated end walls, forming continuous tubes, is characteristic of:

   1. Phloem
   2. Xylem
   3. Collenchyma
   4. Epidermis
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   Answer: B. Xylem

   Vessel elements are the primary water-conducting cells in xylem. They are dead at maturity and have perforated end walls called perforation plates, which allow for efficient, uninterrupted flow of water.

5. The bundle sheath cells in the leaves of C4 plants are characteristically rich in:

   1. Chloroplasts with prominent grana
   2. Lysosomes
   3. Peroxisomes
   4. Mitochondria with extensive cristae
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   Answer: A. Chloroplasts with prominent grana

   In C4 plants, the Calvin cycle occurs in the bundle sheath cells, which have a high concentration of chloroplasts with well-developed grana, enabling efficient photosynthesis under high light intensity.

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