2 What is the name of the cell that surrounds the stomata? A Palisade cell B Guard cell C Spongy cell D Epidermal cell
3 What is the role of the stomata in transpiration? A They absorb water B They release water vapor C They store water D They transport minerals
5 Which cells in the phloem are responsible for food transport? A Xylem vessels B Sieve tubes C Companion cells D Tracheids
7 What is the term for the evaporation of water from the leaves? A Photosynthesis B Transpiration C Respiration D Condensation
8 Which of the following would reduce water loss in a plant? A Waxy cuticle B Large leaf surface C Many stomata D Thin leaves
9 Which of the following is NOT a method of transport in plants? A Osmosis B Diffusion C Active transport D Pumping
10 Which of the following best describes the direction of flow in the phloem? A Only upwards B Only downwards C Both upwards and downwards D Only lateral
11 What is the name of the pressure that pushes water up the xylem? A Root pressure B Transpiration pull C Capillary pressure D Osmotic pressure
12 Water moves from roots to leaves through which of the following? A Transpiration stream B Sieve tubes C Companion cells D Guard cells
13 What is the main factor that affects the rate of transpiration? A Wind speed B Temperature C Humidity D All of the above
14 Which tissue transports food (sugars) from the leaves to other parts of the plant? A Xylem B Phloem C Stomata D Root hairs
15 What is the role of the stomata in photosynthesis? A Allow CO2 to enter B Release oxygen C Release water vapor D All of the above
17 What happens to the rate of transpiration when humidity increases? A Increases B Decreases C Remains the same D Stops completely
18 Which plant tissue is responsible for transporting organic nutrients? A Xylem B Phloem C Meristem D Sclerenchyma
20 What is the role of the transpiration stream? A To cool the plant B To transport minerals C To maintain turgidity D All of the above
21 What is the function of the phloem? A Transport water B Transport mineral ions C Transport food D Transport oxygen
22 Which of the following is a characteristic of phloem? A Transports water B Transports minerals C Transports sugars D Transports gases
23 What is the name of the process where minerals are absorbed into root cells against a concentration gradient? A Osmosis B Diffusion C Active transport D Transpiration
24 Which of the following is a characteristic of xylem vessels? A They are living B They have thick walls C They transport sugars D They have companion cells
25 What is the term for the movement of water through a plant from roots to leaves? A Capillary action B Transpiration pull C Root pressure D Osmotic flow