Q1. What is the function of guard cells in stomata?A. Absorption of mineralsB. Opening and closing of stomatal poreC. Storage of foodD. Providing mechanical support
Q2. Which of the following statements about xylem parenchyma is correct?A. Xylem parenchyma is dead at maturity.B. Xylem parenchyma stores food and helps in lateral conduction of water.C. Xylem parenchyma is responsible for the conduction of water.D. Xylem parenchyma is composed of lignified dead cells.
Q3. Which of the following statements about sieve tube elements in phloem is correct?A. Sieve tube elements have nuclei at maturity.B. Sieve tube elements are supported by companion cells.C. Sieve tube elements are responsible for water transport.D. Sieve tube elements have thick, lignified walls.
Q4. Which of the following statements about bundle sheath cells is incorrect?A. Bundle sheath cells surround vascular bundles.B. Bundle sheath cells regulate the movement of substances into and out of vascular tissues.C. Bundle sheath cells are present only in monocots.D. Bundle sheath cells provide mechanical support.
Q5. What is the function of the casparian strip in the endodermis of roots?A. Absorption of mineralsB. Prevention of passive water movementC. PhotosynthesisD. Transport of food
Q6. Which layer of cells in a dicot root lies just inside the endodermis?A. CortexB. PericycleC. PithD. Medullary rays
Q7. Which of the following statements about root hairs is correct?A. Root hairs develop from the endodermis.B. Root hairs increase the surface area for absorption of water and minerals.C. Root hairs transport photosynthetic products.D. Root hairs are responsible for the transport of organic nutrients.
Q8. Which type of plant cells provide flexibility to young stems and leaves?A. ParenchymaB. CollenchymaC. SclerenchymaD. Xylem fibers
Q9. Which of the following statements about epidermis in plants is incorrect?A. The epidermis is usually a single layer of cells.B. Epidermal cells contain chloroplasts.C. The epidermis helps in reducing water loss.D. Trichomes are part of the epidermal tissue system.
Q10. Which cells in the vascular bundle provide structural support?A. Xylem vesselsB. Sclerenchyma fibersC. Companion cellsD. Phloem parenchyma