1 Which tissue transports food (sugars) from the leaves to other parts of the plant? A Xylem B Phloem C Stomata D Root hairs
2 What is the term for the evaporation of water from the leaves? A Photosynthesis B Transpiration C Respiration D Condensation
3 Which part of the stem contains the xylem and phloem? A Epidermis B Cortex C Vascular bundles D Pith
4 What is the movement of water from the soil into the root called? A Diffusion B Osmosis C Active transport D Transpiration
5 What are the tiny openings on the surface of leaves called? A Stomata B Lenticels C Pores D Chloroplasts
6 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
7 What is the main function of the vascular system in plants? A Photosynthesis B Transport of substances C Storage of food D Support
8 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
10 What is the main difference between xylem and phloem? A Xylem transports water; phloem transports food B Xylem transports food; phloem transports water C Xylem is living; phloem is dead D Xylem is found in leaves; phloem is found in roots
11 What is the function of companion cells in the phloem? A Support the sieve tubes B Control the flow of food C Provide energy for transport D Store nutrients
12 Which plant structure controls the opening and closing of stomata? A Epidermal cells B Guard cells C Mesophyll cells D Root hairs
13 Which of the following is an example of a mineral transported in the xylem? A Glucose B Sucrose C Nitrate D Amino acid
14 Which of the following is a characteristic of phloem? A Transports water B Transports minerals C Transports sugars D Transports gases
15 What is the main factor that affects the rate of transpiration? A Wind speed B Temperature C Humidity D All of the above
17 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
18 Water moves from roots to leaves through which of the following? A Transpiration stream B Sieve tubes C Companion cells D Guard cells
19 Which of the following is NOT a factor affecting transpiration? A Light intensity B Wind C Soil pH D Temperature
20 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
21 Which of the following would reduce water loss in a plant? A Waxy cuticle B Large leaf surface C Many stomata D Thin leaves
22 Which part of the plant transports water and minerals from the roots to the leaves? A Xylem B Phloem C Cortex D Epidermis
23 What is the function of the phloem? A Transport water B Transport mineral ions C Transport food D Transport oxygen
24 Which cells in the roots absorb water and minerals from the soil? A Root cap cells B Root hair cells C Xylem vessels D Phloem sieve tubes
25 What is the process by which water is lost from the plant through stomata? A Photosynthesis B Transpiration C Respiration D Guttation