Root Structure and Function
- What is the main function of root hairs in plants?
- A) Absorption of water and nutrients
- B) Photosynthesis
- C) Transport of water
- D) Storage of food
- Answer: A) Absorption of water and nutrients
- Which tissue is responsible for the absorption of water in the root?
- A) Xylem
- B) Phloem
- C) Epidermis
- D) Endodermis
- Answer: C) Epidermis
- The Casparian strip is found in which part of the root?
- A) Cortex
- B) Epidermis
- C) Endodermis
- D) Phloem
- Answer: C) Endodermis
- Which structure protects the growing tip of the root?
- A) Root cap
- B) Root hairs
- C) Apical meristem
- D) Cortex
- Answer: A) Root cap
- What type of root system is found in monocots?
- A) Fibrous root system
- B) Tap root system
- C) Adventitious root system
- D) Prop root system
- Answer: A) Fibrous root system
- What is the primary function of lateral roots?
- A) Anchorage and water absorption
- B) Photosynthesis
- C) Reproduction
- D) Storage of food
- Answer: A) Anchorage and water absorption
- Which root modification is seen in carrots and radishes?
- A) Fibrous roots
- B) Storage roots
- C) Adventitious roots
- D) Prop roots
- Answer: B) Storage roots
- What tissue in the root is responsible for transporting water and nutrients to the stem?
- A) Phloem
- B) Xylem
- C) Endodermis
- D) Cortex
- Answer: B) Xylem
- Which part of the root is responsible for the growth of root cells?
- A) Root cap
- B) Apical meristem
- C) Xylem
- D) Endodermis
- Answer: B) Apical meristem
- Which of the following is true about the root cortex?
- A) It is the innermost layer of the root.
- B) It is involved in water and nutrient storage.
- C) It contains vascular bundles.
- D) It is the site for gas exchange.
- Answer: B) It is involved in water and nutrient storage.
Stem Structure and Function
- What is the main function of the stem in plants?
- A) Photosynthesis
- B) Transport of water, nutrients, and food
- C) Reproduction
- D) Storage of food
- Answer: B) Transport of water, nutrients, and food
- Which of the following is a characteristic of dicot stems?
- A) Vascular bundles are scattered.
- B) Vascular bundles form a ring.
- C) Presence of a pith.
- D) Both B and C
- Answer: D) Both B and C
- Which structure in the stem is responsible for secondary growth in plants?
- A) Xylem
- B) Phloem
- C) Cambium
- D) Epidermis
- Answer: C) Cambium
- The pith of the stem is primarily involved in:
- A) Transport of water
- B) Photosynthesis
- C) Storage of food
- D) Growth of lateral branches
- Answer: C) Storage of food
- In monocot stems, vascular bundles are typically:
- A) Arranged in a ring
- B) Scattered throughout the stem
- C) Absent
- D) Arranged in concentric circles
- Answer: B) Scattered throughout the stem
- The epidermis in the stem is covered by a waxy layer called:
- A) Cuticle
- B) Lignin
- C) Chloroplasts
- D) Phloem
- Answer: A) Cuticle
- What type of stem modification is seen in potato plants?
- A) Rhizomes
- B) Tendrils
- C) Bulbs
- D) Tubers
- Answer: D) Tubers
- Which tissue in the stem is responsible for transporting food (sugars)?
- A) Xylem
- B) Phloem
- C) Epidermis
- D) Cambium
- Answer: B) Phloem
- Which of the following is the primary function of the cambium in the stem?
- A) Transport of water and nutrients
- B) Storage of food
- C) Formation of new vascular tissue
- D) Photosynthesis
- Answer: C) Formation of new vascular tissue
- Which type of vascular tissue in the stem transports water and minerals from the roots?
- A) Phloem
- B) Xylem
- C) Parenchyma
- D) Collenchyma
- Answer: B) Xylem
Leaf Structure and Function
- Which part of the leaf is responsible for photosynthesis?
- A) Epidermis
- B) Mesophyll
- C) Xylem
- D) Phloem
- Answer: B) Mesophyll
- The outermost layer of cells in a leaf is called the:
- A) Xylem
- B) Phloem
- C) Epidermis
- D) Mesophyll
- Answer: C) Epidermis
- Which cells in the leaf are responsible for gas exchange?
- A) Epidermal cells
- B) Stomata and guard cells
- C) Xylem and phloem
- D) Mesophyll cells
- Answer: B) Stomata and guard cells
- The primary function of the stomata in the leaf is to:
- A) Absorb light
- B) Store water
- C) Allow gas exchange
- D) Protect the plant
- Answer: C) Allow gas exchange
- The central vein of a leaf is made up of:
- A) Epidermis
- B) Xylem and phloem
- C) Mesophyll
- D) Guard cells
- Answer: B) Xylem and phloem
- In leaves, the palisade mesophyll is primarily involved in:
- A) Gas exchange
- B) Water transport
- C) Photosynthesis
- D) Food storage
- Answer: C) Photosynthesis
- Which leaf adaptation helps minimize water loss in desert plants?
- A) Broad leaves
- B) Stomatal openings
- C) Thick cuticle
- D) Large surface area
- Answer: C) Thick cuticle
- In which part of the leaf does the majority of photosynthesis occur?
- A) Epidermis
- B) Stomata
- C) Palisade mesophyll
- D) Spongy mesophyll
- Answer: C) Palisade mesophyll
- Which of the following leaf modifications helps climbing plants?
- A) Spines
- B) Tendrils
- C) Fleshy leaves
- D) Storage leaves
- Answer: B) Tendrils
- What is the function of the guard cells in the leaf?
- A) Transport water
- B) Regulate gas exchange
- C) Store food
- D) Protect the plant
- Answer: B) Regulate gas exchange
