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MCQOPTIONS
This section includes 14620 Mcqs, each offering curated multiple-choice questions to sharpen your NEET knowledge and support exam preparation. Choose a topic below to get started.
| 2201. |
The Tunica Corpus Theory was proposed by: |
| A. | Nageli |
| B. | Hanstein |
| C. | Schmidt |
| D. | Haberlandt |
| Answer» D. Haberlandt | |
| 2202. |
Diffuse porous woods are characteristic of plants growing in: |
| A. | Tropics |
| B. | Alpine region |
| C. | Temperate climate |
| D. | Cold winter regions |
| Answer» B. Alpine region | |
| 2203. |
P-protein belongs to: |
| A. | Xylem parenchyma |
| B. | Trichomes |
| C. | Sieve tube elements |
| D. | Tracheids and vessels |
| Answer» D. Tracheids and vessels | |
| 2204. |
Match column-I with column-II and select the correct answer using the codes given below. Column-I Column-II A. Radial vascular bundle I. Cucurbita pepo B. Collateral vascular bundle II. Dracaena C. Bicollateral vascular bundle III. Roots of angiosperms D. Amphicribral vascular bundle IV. Sunflower stem E. Amphivasal vascular bundle V. fern |
| A. | A-III; B-IV; C-I; D-V; E-II |
| B. | A-II; B-III; C-I; D-V; E-IV |
| C. | A-III; B-IV; C-V; D-I; E-II |
| D. | A-III; B-I; C-II; D-IV; E-V |
| Answer» B. A-II; B-III; C-I; D-V; E-IV | |
| 2205. |
If there is more than one tunica layer in a stem apex, which among the following is most likely to happen? |
| A. | All the layers will develop into epidermal cells. |
| B. | Only the outer layer will develop into epidermal cells. |
| C. | All the layers will develop into cortex. |
| D. | Inner layer develops into cortex. |
| Answer» C. All the layers will develop into cortex. | |
| 2206. |
Which type of meristem is an example of vascular cambium of the root? |
| A. | Apical |
| B. | Intercalary |
| C. | Secondary |
| D. | Root apical |
| Answer» D. Root apical | |
| 2207. |
Read the following statements and answer the question. (i) Cambium is very active and produces a large number of axillary elements having vessels with wider cavities. (ii) It is also called early wood. (iii) It is lighter in colour and has lower density. Which type of wood is described by the above statements? |
| A. | Sap wood |
| B. | Heart wood |
| C. | Spring wood |
| D. | Autumn wood |
| Answer» D. Autumn wood | |
| 2208. |
Which of the following statements are correct about phloem? (i) Phloem transports food materials, usually from roots to the other parts of the plant. (ii) It is composed of sieve tube elements, companion cells, and phloem parenchyma and phloem fibres. (iii) The companion cells are specialised parenchymatous cells which are closely associated with phloem parenchyma. (iv) The first formed primary phloem consists of narrow sieve tubes and referred to as protophloem and the later formed phloem has bigger sieve tubes and referred to as met phloem. |
| A. | Both (i) and (iv) |
| B. | Both (ii) and (iii) |
| C. | Both (ii) and (iv) |
| D. | All of the above |
| Answer» D. All of the above | |
| 2209. |
Match column-I with column-II and choose the correct option. Column-I Column-II A. Bull form cells I. Initiation of lateral roots B. Pericycle II. Root C. Endarchxylem III. Grasses D. Exarch xylem IV. Dicot leaf E. Bundle sheath cells V. Stem |
| A. | A-II; B-V; C-IV; D-I; E-IV |
| B. | A-II; B-V; C-I; D-III; E-IV |
| C. | A-II; B-IV; C-I; D-III; E-V |
| D. | A-III; B-I; C-V; D-II; E-IV |
| Answer» E. | |
| 2210. |
The given figure shows T.S. of monocot stem. Identify the correct labelling of 1 to 6 marked in the given figure. |
| A. | 1 - Epidermis, 2 - Hypodermis, 3 - Vascular bundles, 4 - Phloem, 5 - Xylem, 6 - Ground tissue |
| B. | 1 - Cuticle, 2 - Epidermis, 3 - Sclerenchymatous sheath, 4 - Sclerenchymatous hypodermis, 5 - Parenchymatous |
| C. | sheath, 6 - Phloem 1 - Cuticle, 2 - Epidermis, 3 - Sclerenchymatous hypodermis, 4 - Sclerenchymatous sheath, 5 - Parenchymatous |
| D. | sheath, 6 - Phloem 1 - Cuticle, 2 - Epidermis, 3 - Sclerenchymatous hypodermis, - Sclerenchymatous sheath, 5 - Parenchymatous sheath, 6 - Protoxylem |
| Answer» B. 1 - Cuticle, 2 - Epidermis, 3 - Sclerenchymatous sheath, 4 - Sclerenchymatous hypodermis, 5 - Parenchymatous | |
| 2211. |
In the given figure of phloem tissue, identify the marked part (1, 2 and 3) which help in maintaining the pressure gradient in the sieve tubes. |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | None of the above |
| Answer» D. None of the above | |
| 2212. |
Totipotency is present in: |
| A. | Meristem |
| B. | Xylem |
| C. | Phloem |
| D. | Cork |
| Answer» B. Xylem | |
| 2213. |
A meristem may be defined as the group of cells that: |
| A. | add to the bulk of the plants. |
| B. | conserve food. |
| C. | divide continuously to give rise to new cells. |
| D. | elongate and add to the group of cells. |
| Answer» D. elongate and add to the group of cells. | |
| 2214. |
In the monocot root, we observe: |
| A. | suberised exodermis, polyarch xylem, pith |
| B. | exodermis, endarch, tetrarchclosedbundles |
| C. | conjoint, collateral, open, polyarch vascular bundle |
| D. | suberised exodermis, casparian strip, passage cells, cambium |
| Answer» B. exodermis, endarch, tetrarchclosedbundles | |
| 2215. |
The only plant cells without nuclei among following are: |
| A. | Cambium cells |
| B. | Xylem vessels |
| C. | Root hairs |
| D. | Companion cells |
| Answer» C. Root hairs | |
| 2216. |
Which of the dorsiventral leaf has a multilayered epidermis? |
| A. | Mulberry |
| B. | Banyan |
| C. | Nerium |
| D. | Eucalyptus |
| Answer» C. Nerium | |
| 2217. |
The closing layers in a lenticel may show the deposition of: |
| A. | Cutin |
| B. | Pectin |
| C. | Lignin |
| D. | Suberin |
| Answer» E. | |
| 2218. |
When secondary growth is initiated in dicot stem what will happen first? |
| A. | The cells of cambium divide periclinally to form xylem mother cells. |
| B. | Inter fascicular cambium join with intra fascicular cambium. |
| C. | Parenchymatous cells present between vascular bundle become meristematic. |
| D. | Pith get obliterated. |
| Answer» D. Pith get obliterated. | |
| 2219. |
Endodermal cells can be distinguished by the presence of: |
| A. | Cambium cells |
| B. | Elongated cells |
| C. | Thin-walled cells |
| D. | Barrel-shaped cells |
| Answer» E. | |
| 2220. |
Select the combination of correct statements from the options given below.(i) Annual rings are formed as a result of seasonal environmental conditions.(ii) Tracheid's/vessels elements are larger during periods when water is abundant.(iii) Tracheid's/vessels elements have thicker wall during periods of water deprivation.(iv) Wood formed in the previous years is darker than newer wood. |
| A. | (i) and (ii) |
| B. | (ii) and (iv) |
| C. | (i), (ii) and (iii) |
| D. | (ii), (iii) and (iv) |
| Answer» D. (ii), (iii) and (iv) | |
| 2221. |
Monocot leaves grow by: |
| A. | Apical meristem |
| B. | Lateral meristem |
| C. | Intercalary meristem |
| D. | Dermatogen |
| Answer» D. Dermatogen | |
| 2222. |
Choose the correct answer for 1 to 6 labelling in the given figure. |
| A. | 1 -Phellem, 2-Phellogen, 3 -Medullary rays, 4 - Secondary xylem, 5 - Secondary phloem, 6 - Cambium ring |
| B. | 1 -Phellem, 2-Phellogen,3-Medullary rays, 4 - Secondary phloem, 5 - Secondary xylem, 6 - Cambium ring |
| C. | 1 -Phellogen, 2-Phellem, 3 -Medullary rays, 4 - Secondary xylem, 5 - Secondary phloem, 6 - Cambium ring |
| D. | 1 -Phellem, 2-Phellogen, 3 -Cambiumring, 4 - Secondary xylem, 5 - Secondary phloem, - Medullary rays |
| Answer» B. 1 -Phellem, 2-Phellogen,3-Medullary rays, 4 - Secondary phloem, 5 - Secondary xylem, 6 - Cambium ring | |
| 2223. |
Periblem form: |
| A. | Endodermis |
| B. | Cortex |
| C. | Both (a) and (b) |
| D. | Epidermis |
| Answer» D. Epidermis | |
| 2224. |
Secondary growth in the dicot stems is possible because of the presence of: |
| A. | Xylem |
| B. | Phloem |
| C. | Cambium |
| D. | Medullary rays |
| Answer» D. Medullary rays | |
| 2225. |
Annual rings are the bands of: |
| A. | secondary cortex and cork |
| B. | all secondary vascular tissues |
| C. | secondary xylem and xylem rays |
| D. | secondary phloem and medullary rays |
| Answer» D. secondary phloem and medullary rays | |
| 2226. |
Periderm is formed from: |
| A. | Vascular cambium |
| B. | Phellogen |
| C. | Fascicular cambium |
| D. | Interfascicular cambium |
| Answer» C. Fascicular cambium | |
| 2227. |
In woody dicotyledons, the arrangement of vessels is either diffuse porous or ring porous. Based on the these data, which one of the following statements is correct? |
| A. | Ring porous vessels are specialised and are used for conducting more water for a shorter period only, when trioses occur early in the vessels. |
| B. | Although diffuse porous vessels are not so specialised as ring porous vessels, they conduct more water at all periods and through new xylem vessels added gradually during development. |
| C. | Diffuse porous vessels carry more water and also faster because of a greater number of small vessels having greater capillary force. |
| D. | Ring porous vessels conduct more water as they are formed early during development, when the need for water is great. |
| Answer» E. | |
| 2228. |
Phloem parenchyma are absent in: |
| A. | Dicots |
| B. | Monocots |
| C. | Gymnosperms |
| D. | All of these |
| Answer» C. Gymnosperms | |
| 2229. |
Match column-I with column-II and choose the correct option. Column-I Column-II A. Spring wood or wood I. Lighter in colour early B. Autumn wood or late wood II. High density III. Low density IV. Darker in colour V. Larger number of xylem elements VI. Vessels with wider cavity VII. Lesser number of xylem elements VIII. Vessels with small cavity Which of the following combination is correct? |
| A. | A - II; IV; VII; VIII; B - I; III; V; VI |
| B. | A - I; II; VII; VIII; B - III; IV; V; VI |
| C. | A - I; III; V; VI; B - II; IV; VII; VIII |
| D. | A - I; III; VII; VIII; B - II; IV; V; VI |
| Answer» D. A - I; III; VII; VIII; B - II; IV; V; VI | |
| 2230. |
Which of the following statement(s) is/are correct? (i) Uneven thickening of cell wall is characteristic of sclerenchyma. (ii) Periblem forms cortex of the stem and the root. (iii) Tracheids are the chief water transporting elements in gymnosperms. (iv) Companion cell is devoid of nucleus at maturity. (v) The commercial cork is obtained from Quercus suber. |
| A. | (i) and (iv) only |
| B. | (ii) and (v) only |
| C. | (iii) and (iv) only |
| D. | (ii), (iii) and (v) only |
| Answer» E. | |
| 2231. |
Extrastelar secondary growth takes place by: |
| A. | Vascular cambium |
| B. | Phellogen |
| C. | Phellem |
| D. | Phelloderm |
| Answer» C. Phellem | |
| 2232. |
How many growth rings should be develop per year in a plant grown in Rajasthan with four distinct seasons (viz, summer, rain, winter and spring)? |
| A. | Four |
| B. | Two |
| C. | One |
| D. | None of these |
| Answer» C. One | |
| 2233. |
The cork of commerce comes from: |
| A. | Quercus suber |
| B. | Quercus incana |
| C. | Quercus ithaburensis |
| D. | All of the above |
| Answer» B. Quercus incana | |
| 2234. |
When phloem and cambium are present on both sides of xylem, the vascular bundle is called: |
| A. | Bicollateral |
| B. | Radial |
| C. | Concentric |
| D. | Collateral |
| Answer» B. Radial | |
| 2235. |
In Cucurbita, stem vascular bundles are: |
| A. | Radial |
| B. | Collateral |
| C. | Concentric |
| D. | Bicollateral |
| Answer» E. | |
| 2236. |
The given figure shows apical meristem of root apex with few part marked as 1, 2 and 3. Identify the correct labelling of 1, 2 and 3. |
| A. | 1 - Vascular structure, 2 - Protoderm, 3 - Root cap |
| B. | 1 - Cortex, 2 - Endodermis, 3 - Root cap |
| C. | 1 - Cortex, 2 - Protoderm, 3 - Root cap |
| D. | 1 - Tunica, 2 - Protoderm, 3 - Root cap |
| Answer» D. 1 - Tunica, 2 - Protoderm, 3 - Root cap | |
| 2237. |
What happens in plants during vascularisation? |
| A. | Differentiation of procambium, formation of primary phloem followed by formation of primary xylem. |
| B. | Differentiation of procambium followed by the formation of primary phloem and xylem simultaneously. |
| C. | Formation of procambium, primary phloem and xylem simultaneously. |
| D. | Differentiation of procambium followed by the formation of secondary xylem. |
| Answer» C. Formation of procambium, primary phloem and xylem simultaneously. | |
| 2238. |
Active divisions occur in the cells of: |
| A. | Xylem |
| B. | Phloem |
| C. | Cambium |
| D. | Collenchyma |
| Answer» D. Collenchyma | |
| 2239. |
In roots of monocotyledon, the histogen present at the apex of the root tip is: |
| A. | Dermatogen |
| B. | Procambium |
| C. | Calyptrogen |
| D. | Plerome |
| Answer» D. Plerome | |
| 2240. |
Choose the correct option for T.S. of monocot root. |
| A. | 1 - Root hair, 2 - Epiblema, 3 - Cortex, 4 - Endodermis, 5 - Passage cell, 6 - Pericycle, 7 - Pith, 8 - Phloem, 9 - Metaxylem, 10 - Protoxylem |
| B. | 1 - Root hair, 2 - Epiblema, 3 - Cortex, 4 - Endodermis, 5 - Passage cell, 6 - Pith, 7 - Pericycle, 8 - Metaxylem, 9 - Phloem, 10 - Protoxylem |
| C. | 1 - Root hair, 2 - Epiblema, 3 - Cortex, 4 - Endodermis, 5 - Pericycle, 6 - Passage cell, 7 - Phloem, 8 - Pith, 9 - Protoxylem, 10 - Metaxylem |
| D. | 1 - Root hair, 2 - Cortex, 3 - Epiblema, 4 - Pericycle, 5 - Endodermis, 6 - Pith, 7- Passage cell, 8 - Phloem, 9 - Protoxylem, 10 - Metaxylem |
| Answer» B. 1 - Root hair, 2 - Epiblema, 3 - Cortex, 4 - Endodermis, 5 - Passage cell, 6 - Pith, 7 - Pericycle, 8 - Metaxylem, 9 - Phloem, 10 - Protoxylem | |
| 2241. |
The trees growing in deserts will: |
| A. | show alternate rings of xylem and sclerenchyma. |
| B. | show distinct annual rings. |
| C. | not show distinct annual rings. |
| D. | have only conjunctive tissue and phloem formed by the activity of cambium. |
| Answer» D. have only conjunctive tissue and phloem formed by the activity of cambium. | |
| 2242. |
Abnormal secondary growth is observed in: |
| A. | Dracaena |
| B. | Wheat |
| C. | Ginger |
| D. | Rice |
| Answer» B. Wheat | |
| 2243. |
From where the commercial jute fibres are obtained? |
| A. | Interxylary fibres |
| B. | Xylem fibres |
| C. | Phloem fibres |
| D. | None of these |
| Answer» D. None of these | |
| 2244. |
All the following statements regarding sieve tube elements are correct except that: |
| A. | their end walls have perforated sieve plates which become impregnated with lignin at maturity. |
| B. | they possess peripheral cytoplasm as well as a large vacuole. |
| C. | distinct proteinaceous inclusions, the P-proteins are seen evenly distributed throughout the lumen. |
| D. | long, slender, tube-like structures arranged in longitudinal series. |
| Answer» B. they possess peripheral cytoplasm as well as a large vacuole. | |
| 2245. |
Healing of wound in plants takes place by activity of: |
| A. | Intercalary meristem |
| B. | Secondary meristem |
| C. | Apical meristem |
| D. | Lateral meristem |
| Answer» C. Apical meristem | |
| 2246. |
Read the following statements and select the correct one(s) from the options. (i) In flowering plants, tracheid and vessels are the main water transporting elements. (ii) The presence of vessels is a characteristic feature of angiosperms. (iii) Xylem fibres have highly thinned walls and their cell walls are made up of cellulose. (iv) Xylem parenchyma store food materials in the form of starch or fat and other substances like tannins. |
| A. | Only (i) |
| B. | Both (ii) and (iii) |
| C. | Both (iii) and (iv) |
| D. | (i), (ii) and (iv) |
| Answer» E. | |
| 2247. |
T.S. of dicot stem is given below, certain parts have been indicated by alphabets. Choose the correct option. |
| A. | 1 - Epidermis, 2 - Epidermal hairs, 3 - Parenchyma, 4 - Starch Sheath, 5 - Hypodermis (collenchyma), 6 - Vascular bundle, 7 - Bundle cap, 8 - Medulla or pith, 9 - Medullary rays |
| B. | 1 - Epidermal hairs, 2 - Epidermis, 3 - Hypodermis (collenchyma), 4 - Parenchyma, 5 - Starch sheath, 6 - Bundle cap, 7 - Vascular bundle, 8 - Medullary rays, 9 - Medulla or pith |
| C. | 1 - Epidermal hairs, 2 - Epidermis, 3 - Hypodermis (collenchyma), 4 - Starch sheath, 5 - Parenchyma, 6 - Vascular bundle, 7 - Bundle cap, 8 - Medulla or pith, 9 - Medullary rays |
| D. | 1 - Epidermal hairs, 2 - Epidermis, 3 - Parenchyma, 4 - Hypodermis (collenchyma), 5 - Starch sheath, 6 - Vascular bundle, 7 - Bundle cap, 8 - Medulla or pith, 9 - Medullary rays |
| Answer» C. 1 - Epidermal hairs, 2 - Epidermis, 3 - Hypodermis (collenchyma), 4 - Starch sheath, 5 - Parenchyma, 6 - Vascular bundle, 7 - Bundle cap, 8 - Medulla or pith, 9 - Medullary rays | |
| 2248. |
Which of the following statement is correct about heart wood/duramen? (i) It does not help in water and mineral conduction. (ii) It is dark coloured but soft. (iii) It has treachery elements filled with tannins, resins, gums, oil, etc. (iv) It is a peripheral part. (v) They are sensitive to microbes and insects, hence least durable. |
| A. | (i) and (iii) |
| B. | (ii) and (iii) |
| C. | (iv) and (v) |
| D. | (iii) and (iv) |
| Answer» B. (ii) and (iii) | |
| 2249. |
In dicotyledonous stem, fascicular cambium is a meristematic tissue. It is an example of which of the following meristem? |
| A. | Lateral |
| B. | Secondary |
| C. | Apical |
| D. | Intercalary |
| Answer» B. Secondary | |
| 2250. |
If a stem is girdled: |
| A. | root dies first |
| B. | shoot dies first |
| C. | Both die together |
| D. | Neither root nor shoot would die |
| Answer» B. shoot dies first | |