Anatomy of dicot and monocot root, stem and leaf — NEET & JEE Questions

Question 1 · difficulty L1 · recall

In a typical dicot root, xylem and phloem are arranged

• A. radially on different radii
• B. in the same vascular bundle with cambium
• C. randomly in ground tissue
• D. only in the pith

Question 2 · difficulty L2 · understanding

Which feature is typical of a monocot stem but not of a typical dicot stem?

• A. Vascular bundles are scattered in the ground tissue
• B. Vascular bundles form a ring
• C. A distinct vascular cambium occurs within each bundle
• D. Secondary growth is usually prominent

Question 3 · difficulty L2 · understanding

In the seeds of cereals, the outer covering of endosperm separates the embryo by a protein-rich layer called:

• A. Integument
• B. Aleurone layer
• C. Coleoptile
• D. Coleorhiza

Question 4 · difficulty L2 · understanding

Find the statement that is NOT correct with regard to the structure of monocot stem.

• A. Vascular bundles are conjoint and closed.
• B. Phloem parenchyma is absent.
• C. Hypodermis is parenchymatous.
• D. Vascular bundles are scattered.

Question 5 · difficulty L3 · understanding

The main function of bulliform cells in grasses is :

• A. to make the leaf impermeable to fungal spores.
• B. to transport water.
• C. to perform photosynthesis.
• D. to minimize water loss during water stress.

Question 6 · difficulty L3 · understanding

$$\text { Match List-I with List-II : }$$ List-I (Phase of cell cycle) List-II (Activity) A. Conjunctive tissue I. Specialised cells in the vicinity of guard cells B. Casparian strips II. Endodermal cells rich in starch C. Subsidiary cells III. Tissue between xylem and phloem D. Starch sheath IV. Endodermal cells with suberin deposition Choose the correct answer from the options given below :

• A. A-IV, B-III, C-I, D-II
• B. A-III, B-IV, C-II, D-I
• C. A-III, B-IV, C-I, D-II
• D. A-IV, B-III, C-II, D-I

Question 7 · difficulty L3 · understanding

Given below are two statements: Statement I: In a dicotyledonous leaf, the adaxial epidermis generally bears more stomata than the abaxial epidermis. Statement II: In a dicotyledonous leaf, the adaxially placed palisade parenchyma is made up of elongated cells, which are arranged vertically and parallel to each other. In the light of the above statements, choose the correct answer from the options given below:

• A. Statement I is true but Statement II is false
• B. Statement I is false but Statement II is true
• C. Both Statement I and Statement II are true
• D. Both Statement I and Statement II are false

Question 8 · difficulty L3 · understanding

In the given figure, which component has thin outer walls and highly thickened inner walls?

• A. C
• B. D
• C. A
• D. B

Question 9 · difficulty L3 · understanding

The transverse section of a plant part showed polyarch, radial and exarch xylem, with endodermis and pericycle. The plant part is identified as :

• A. Monocot root
• B. Dicot root
• C. Dicot stem
• D. Monocot stem

Question 10 · difficulty L3 · understanding

Given below are two statements : Statement I : Endarch and exarch are the terms often used for describing the position of secondary xylem in the plant body. Statement II : Exarch condition is the most common feature of the root system. In the light of the above statements, choose the correct answer from the options given below:

• A. Both Statement I and Statement II are false
• B. Statement I is correct but Statement II is false
• C. Statement I is incorrect but Statement II is true
• D. Both Statement I and Statement II are true