- What is the primary function of the stem in plants?
- A) Photosynthesis
- B) Support and transport
- C) Water absorption
- D) Storage
- Which part of the stem is responsible for growth in length?
- A) Lateral meristem
- B) Apical meristem
- C) Cortex
- D) Pith
- What type of tissue is responsible for the transport of water in stems?
- A) Phloem
- B) Xylem
- C) Cortex
- D) Epidermis
- Which layer of cells in the stem is responsible for producing secondary growth?
- A) Epidermis
- B) Vascular cambium
- C) Cortex
- D) Pith
- What is the role of the pith in the stem?
- A) Photosynthesis
- B) Storage
- C) Support
- D) Water transport
- In which type of plant would you expect to find a large amount of parenchyma in the stem?
- A) Conifers
- B) Herbaceous plants
- C) Cacti
- D) Grasses
- What type of cells make up the outermost layer of the stem?
- A) Sclerenchyma
- B) Epidermal cells
- C) Parenchyma
- D) Collenchyma
- Which type of stem modification is seen in cacti?
- A) Succulent stems
- B) Climbing stems
- C) Tubular stems
- D) Rhizomes
- What type of growth is characterized by an increase in the thickness of the stem?
- A) Primary growth
- B) Secondary growth
- C) Lateral growth
- D) Apical growth
- Which of the following is NOT a component of vascular tissue in the stem?
- A) Xylem
- B) Phloem
- C) Cortex
- D) Cambium
- Which plant structure allows for the exchange of gases in stems?
- A) Xylem
- B) Phloem
- C) Lenticels
- D) Cortex
- What type of stem is found in plants that grow horizontally above the ground?
- A) Stolon
- B) Rhizome
- C) Bulb
- D) Corm
- In woody plants, what is the primary component of the outer bark?
- A) Cortex
- B) Periderm
- C) Phloem
- D) Cambium
- What is the function of collenchyma tissue in stems?
- A) Water transport
- B) Support in young stems
- C) Photosynthesis
- D) Nutrient storage
- Which cells in the xylem are responsible for water conduction?
- A) Phloem fibers
- B) Tracheids and vessel elements
- C) Companion cells
- D) Parenchyma cells
- What type of vascular arrangement is typical of monocot stems?
- A) Ring arrangement
- B) Scattered vascular bundles
- C) Alternating pattern
- D) Central core
- Which type of stem grows underground and stores nutrients?
- A) Stolon
- B) Rhizome
- C) Corm
- D) Stipe
- What is the role of the vascular cambium in stems?
- A) Photosynthesis
- B) Production of new xylem and phloem
- C) Storage of nutrients
- D) Protection of the stem
- What part of the stem is often involved in the production of new leaves and flowers?
- A) Pith
- B) Node
- C) Internode
- D) Apex
- What type of meristematic tissue is responsible for the formation of new vascular tissue?
- A) Apical meristem
- B) Vascular cambium
- C) Cork cambium
- D) Intercalary meristem
- Which plant part is primarily responsible for storing carbohydrates?
- A) Epidermis
- B) Cortex
- C) Xylem
- D) Phloem
- What is the function of the cork cambium in stems?
- A) Production of cork cells
- B) Photosynthesis
- C) Water transport
- D) Nutrient absorption
- What type of growth occurs at the apical meristem of stems?
- A) Primary growth
- B) Secondary growth
- C) Lateral growth
- D) Tertiary growth
- Which tissue is primarily responsible for the transport of sugars in the stem?
- A) Xylem
- B) Phloem
- C) Cortex
- D) Epidermis
- In woody plants, what structure protects the inner layers from desiccation?
- A) Cortex
- B) Bark
- C) Pith
- D) Cambium
- What happens to the vascular bundles during secondary growth in woody plants?
- A) They disappear
- B) They become thicker
- C) They turn into leaves
- D) They reduce in number
- What is the primary role of sclerenchyma cells in stems?
- A) Photosynthesis
- B) Support and strength
- C) Water transport
- D) Nutrient storage
- Which type of stem modification is characterized by swollen nodes?
- A) Corm
- B) Bulb
- C) Stolon
- D) Rhizome
- What part of the stem is responsible for elongation during primary growth?
- A) Cortex
- B) Apical meristem
- C) Pith
- D) Vascular cambium
- What is the primary function of vascular tissue in stems?
- A) Transport of nutrients and water
- B) Photosynthesis
- C) Support
- D) Gas exchange
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