Practice free Plant Anatomy Plant Tissues (Botany) NEET multiple-choice questions online with instant answers and detailed explanations. No login required.
Cellulose does not form blue colour with Iodine because:
Starch traps I₂ in its helix → blue. Cellulose lacks such a helix → no colour.
Statement I: The forces generated by transpiration can lift a xylem-sized column of water over 130 meters height. Statement II: Transpiration cools leaf surfaces sometimes 10 to 15 degrees, by evaporative cooling.
Both NCERT-stated facts about transpiration are correct.
Identify the correct statements:
A. Lenticels are the lens-shaped openings permitting the exchange of gases. B. Bark formed early in the season is called hard bark. C. Bark is a technical term that refers to all tissues exterior to vascular cambium. D. Bark refers to periderm and secondary phloem. E. Phellogen is single-layered in thickness.
A and D correct. B wrong (early-season bark is SOFT). C wrong (bark is NON-technical per NCERT). E wrong (phellogen is a couple of layers thick).
Match List I with List II:
| List I | List II |
|---|---|
| A. Cohesion | I. More attraction in liquid phase |
| B. Adhesion | II. Mutual attraction among water molecules |
| C. Surface tension | III. Water loss in liquid phase |
| D. Guttation | IV. Attraction towards polar surfaces |
A-II (cohesion = mutual attraction); B-IV (adhesion to polar); C-I; D-III (guttation = liquid water loss).
Given below are two statements:
Statement I: Parenchyma is living but collenchyma is dead tissue.
Statement II: Gymnosperms lack xylem vessels but presence of xylem vessels is the characteristic of angiosperms.
In the light of the above statements, choose the correct answer from the options given below:
Both parenchyma and collenchyma are living tissues (only sclerenchyma is dead) — Statement I is false. Statement II is a standard NCERT fact.
Match List I with List II.
| List I | List II |
|---|---|
| A. Nucleolus | I. Site of formation of glycolipid |
| B. Centriole | II. Organization like the cartwheel |
| C. Leucoplasts | III. Site for active ribosomal RNA synthesis |
| D. Golgi apparatus | IV. For storing nutrients |
Choose the correct answer from the options given below:
Nucleolus → rRNA synthesis; Centriole → cartwheel; Leucoplasts → nutrient storage; Golgi → glycolipid formation.
Bulliform cells are responsible for:
Loss of turgor in bulliform cells causes leaves to roll inward, reducing transpiration.
In the given figure of a stoma in transverse section, which component has thin outer walls and highly thickened inner walls? (Labels A, B, C, D mark four parts; B marks the guard cells.)
Guard cells (B) have unevenly thickened walls — thin outer, thick inner — enabling stomatal opening.
Find the statement that is NOT correct with regard to the structure of monocot stem.
In a monocot stem the hypodermis is sclerenchymatous (not parenchymatous); the other statements are correct.
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The bank mixes NEET previous year questions (PYQs) with practice questions, each tagged with its exam appearances where applicable.