1 Which micronutrient is essential for the synthesis of chlorophyll in plants? A Iron B Magnesium C Nitrogen D Phosphorus
2 Deficiency of which nutrient causes chlorosis? A Nitrogen B Phosphorus C Potassium D All of the above
3 What is the main driving force for the ascent of xylem sap? A Root pressure B Transpirational pull C Capillary action D Active transport
4 What is the function of the endodermis in roots? A It regulates the flow of water and minerals into the vascular cylinder. B It stores starch. C It transports sugars. D It absorbs water.
5 The movement of water molecules from a region of higher concentration to a region of lower concentration through a semi-permeable membrane is called: A Diffusion B Osmosis C Active transport D Transpiration
7 Xerophytes are plants adapted to: A Dry habitats B Waterlogged habitats C Salty habitats D Moderate habitats
9 Which macronutrient is a core component of chlorophyll and is essential for photosynthesis? A Iron B Magnesium C Calcium D Sulfur
10 Which process allows water to move through a plant from roots to leaves? A Translocation B Transpiration C Photosynthesis D Respiration
11 Which tissue is responsible for the transport of water and minerals in plants? A Phloem B Xylem C Cortex D Epidermis
13 Symplastic movement of water occurs: A Along cell walls. B Through the cytoplasm via plasmodesmata. C Through the apoplast. D Outside the root.
14 What is the primary function of root hairs in plants? A To anchor the plant in the soil B To increase surface area for water and mineral absorption C To store excess food D To transport sugars to the leaves
15 What is the role of potassium in plants? A It is a component of chlorophyll. B It helps in protein synthesis. C It regulates stomatal opening and closing. D It is part of the cell wall.
16 Which of the following factors increases the rate of transpiration? A High humidity B Low temperature C High wind speed D Closed stomata
17 Which of the following is a macronutrient required for protein synthesis? A Nitrogen B Iron C Manganese D Zinc
18 What is the primary force responsible for the upward movement of water in the xylem? A Root pressure B Transpirational pull C Capillary action D Active transport
19 Which tissue is responsible for transporting water and minerals in plants? A Phloem B Xylem C Cortex D Epidermis
20 Which process describes the loss of water vapor from the aerial parts of a plant through stomata? A Respiration B Translocation C Transpiration D Guttation
21 Which adaptation helps xerophytes reduce transpiration? A Large, broad leaves B Sunken stomata C Thin cuticle D Numerous stomata on upper surface
22 In which form do plants store metabolic wastes like resins and gums? A In the vacuoles of cells B In the xylem vessels C In special excretory organs D By shedding leaves
23 The endodermis is a layer of cells that: A absorbs water and minerals. B regulates the flow of water into the xylem. C transports food. D stores starch.
24 What is the function of root hairs? A To anchor the plant B To absorb water and minerals C To store food D To transport food
25 The movement of water across a semi-permeable membrane from a region of higher water potential to lower water potential is called: A Diffusion B Osmosis C Active transport D Translocation