- What is the primary function of xylem in vascular plants?
- A) Transport of sugars
- B) Transport of water and minerals
- C) Photosynthesis
- D) Storage of nutrients
- Which type of cell in xylem is primarily responsible for water conduction?
- A) Parenchyma
- B) Tracheids
- C) Sieve elements
- D) Companion cells
- What type of tissue makes up the phloem?
- A) Living cells
- B) Dead cells
- C) Both living and dead cells
- D) None of the above
- Which component of phloem is responsible for the transport of carbohydrates?
- A) Tracheids
- B) Sieve tubes
- C) Vessel elements
- D) Xylem fibers
- What structure connects sieve tube elements in phloem?
- A) Companion cells
- B) Sieve plates
- C) Tracheids
- D) Perforation plates
- Which of the following is a primary characteristic of xylem?
- A) It consists mainly of dead cells.
- B) It transports nutrients.
- C) It conducts photosynthesis.
- D) It is composed of living cells.
- What are the two main types of cells found in xylem?
- A) Sieve cells and companion cells
- B) Tracheids and vessel elements
- C) Phloem fibers and parenchyma
- D) Epidermal cells and cortex
- Which plant structure is involved in the upward movement of water through xylem?
- A) Root hairs
- B) Leaves
- C) Flowers
- D) Stems
- What process primarily drives the movement of water in xylem?
- A) Active transport
- B) Transpiration
- C) Osmosis
- D) Diffusion
- Which of the following statements about phloem is true?
- A) It is primarily made of dead cells.
- B) It transports nutrients and organic compounds.
- C) It conducts water.
- D) It is found only in roots.
- Which cells support the structure of the xylem?
- A) Parenchyma cells
- B) Fibers
- C) Sieve tube elements
- D) Companion cells
- In which direction does phloem transport nutrients?
- A) Only upward
- B) Both upward and downward
- C) Only downward
- D) From roots to leaves only
- What type of xylem cell is more efficient in water conduction?
- A) Tracheids
- B) Vessel elements
- C) Fibers
- D) Parenchyma
- What is the primary role of companion cells in phloem?
- A) Support sieve tube elements
- B) Conduct water
- C) Store nutrients
- D) Provide rigidity
- Which vascular tissue is primarily responsible for support in plants?
- A) Xylem
- B) Phloem
- C) Parenchyma
- D) Epidermis
- What is the function of parenchyma cells in xylem and phloem?
- A) Storage and lateral transport
- B) Conduct water
- C) Provide structural support
- D) Facilitate nutrient transport
- Which type of xylem cells are found in gymnosperms but not in most angiosperms?
- A) Tracheids
- B) Vessel elements
- C) Fibers
- D) Sieve tube elements
- What is the primary component of the xylem cell wall?
- A) Cellulose
- B) Lignin
- C) Both cellulose and lignin
- D) Starch
- Which of the following best describes the movement of nutrients in phloem?
- A) From source to sink
- B) Only upward
- C) From leaves to roots only
- D) Random movement
- What is the main type of cell found in the phloem that aids in nutrient transport?
- A) Parenchyma
- B) Sieve cells
- C) Tracheids
- D) Vessel elements
- What type of connection allows communication between companion cells and sieve tubes?
- A) Plasmodesmata
- B) Plasmodesmata and sieve plates
- C) Perforation plates
- D) Lateral connections
- In xylem, which structure provides maximum water conduction?
- A) Vessel elements
- B) Tracheids
- C) Fibers
- D) Parenchyma
- Which plant tissue is most affected by girdling?
- A) Xylem
- B) Phloem
- C) Parenchyma
- D) Cambium
- What is the term for the process of water moving through xylem due to evaporation?
- A) Osmosis
- B) Transpiration
- C) Diffusion
- D) Capillarity
- Which vascular tissue can be found in both roots and leaves?
- A) Both xylem and phloem
- B) Only xylem
- C) Only phloem
- D) Parenchyma
- Which xylem component provides flexibility and resistance to bending?
- A) Fibers
- B) Tracheids
- C) Vessel elements
- D) Companion cells
- What part of the plant is typically the primary site of photosynthesis?
- A) Roots
- B) Leaves
- C) Stems
- D) Flowers
- Which of the following vascular tissues is typically found in greater quantity in older stems?
- A) Phloem
- B) Xylem
- C) Cambium
- D) Epidermis
- Which type of tissue allows for lateral transport of nutrients in phloem?
- A) Sieve tubes
- B) Companion cells
- C) Tracheids
- D) Vessel elements
- What is the primary method by which phloem transports nutrients throughout the plant?
- A) Gravity
- B) Pressure flow hypothesis
- C) Capillary action
- D) Osmosis
- Root Structure and Function MCQs
- Stem Anatomy and Growth MCQs
- Leaf Structure and Function MCQs
- Flower Anatomy MCQs
- Seed and Fruit Anatomy MCQs
- Plant Cells and Tissues MCQs
- Secondary Growth in Plants MCQs
- Epidermis and Cuticle MCQs
- Stomata and Gas Exchange MCQs
- Meristems and Plant Growth MCQs
- Parenchyma, Collenchyma, and Sclerenchyma MCQs
- Plant Hormones and Growth Regulators MCQs
- Adaptations of Plant Structures MCQs
- Anatomy of Angiosperms vs. Gymnosperms MCQs
- Leaf Venation Patterns MCQs
- Root Hair and Water Absorption MCQs
- Node and Internode Structures MCQs
- Bark and Wood Anatomy MCQs
- Plant Reproductive Structures MCQs