MCQOPTIONS
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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.
| 2301. |
In which one of the following species of Selaginella, the apex continues its vegetative growth beyond the formation of strobilus [BHU 1991] |
| A. | S. helvetica |
| B. | S. cuspidiata |
| C. | S. rupestris |
| D. | None of these |
| Answer» C. S. rupestris | |
| 2302. |
The basal portion of ligule of Selaginella is hemispherical and is called [BHU 1991] |
| A. | Glossopodium |
| B. | Awn of ligule |
| C. | Bundle sheath |
| D. | Pedicel of ligule |
| Answer» B. Awn of ligule | |
| 2303. |
Which of the following is not correct with reference to Selaginella [BHU 1991] |
| A. | Selaginella is commonly distributed on hills and plains |
| B. | Some species of Selaginella are truly xerophytic |
| C. | The vascular cylinder is protostelic |
| D. | The endodermis is trabeculated |
| Answer» B. Some species of Selaginella are truly xerophytic | |
| 2304. |
Selaginella has the character of evolutionary importance. That character is [CBSE PMT 1989; JIPMER 1993; BHU 1994] |
| A. | Ligule |
| B. | Seed |
| C. | Heterospory |
| D. | Strobilus |
| Answer» D. Strobilus | |
| 2305. |
Trabeculae endodermis is found in [BHU 1987; MP PMT 2000] |
| A. | Axis and capsule of moss plant |
| B. | Stem of Selaginella |
| C. | Stem of Cycas |
| D. | Stem of Pinus |
| Answer» C. Stem of Cycas | |
| 2306. |
Rhizophores are formed in |
| A. | Bryophytes |
| B. | Selaginella |
| C. | Pteridium |
| D. | Gymnosperms |
| Answer» C. Pteridium | |
| 2307. |
If four radial vascular bundles are present, then the structure will be [CBSE PMT 2002] |
| A. | Monocot stem |
| B. | Monocot root |
| C. | Dicot stem |
| D. | Dicot root |
| Answer» E. | |
| 2308. |
Growth rings are formed due to activity of [CPMT 2004] |
| A. | Extrastelar cambium |
| B. | Intrastelar cambium |
| C. | Interstelar cambium |
| D. | Both [b] and [c] |
| Answer» E. | |
| 2309. |
Auxenometer is used to measure [Pb. PMT 2004] |
| A. | Length |
| B. | Width |
| C. | Depth |
| D. | Growth |
| Answer» E. | |
| 2310. |
In dicot stem, vascular bundles are [Orissa JEE 2004] |
| A. | Numerous scattered |
| B. | Arranged in a ring |
| C. | Without cambium |
| D. | Surrounded by bundle sheath |
| Answer» C. Without cambium | |
| 2311. |
The best method to determine the age of tree is [MP PMT 2004] |
| A. | To find out the number of branches |
| B. | To count the number of annual rings |
| C. | To measure its diameter |
| D. | To count the number of leaves |
| Answer» C. To measure its diameter | |
| 2312. |
Which of the following is known as wood [AFMC 2003] |
| A. | Primary xylem |
| B. | Secondary xylem |
| C. | Secondary phloem |
| D. | Cambium |
| Answer» C. Secondary phloem | |
| 2313. |
The bark of tree comprises [CPMT 1979, 96; CET Pune 1998] |
| A. | All the tissues outside the vascular cambium |
| B. | All the tissues outside the cork cambium |
| C. | Only the cork |
| D. | The cork and secondary cortex |
| Answer» C. Only the cork | |
| 2314. |
The periderm includes [CBSE PMT 1998; Pb. PMT 2004] |
| A. | Cork |
| B. | Cambium |
| C. | Secondary phloem |
| D. | All of these |
| Answer» E. | |
| 2315. |
Periderm is made up of [MP PMT 1995] |
| A. | Phellem |
| B. | Phellogen |
| C. | Phelloderm |
| D. | All the above |
| Answer» E. | |
| 2316. |
Which of the following meristems is responsible for extrastelar secondary growth in dicotyledonous stem [CBSE PMT 1998] |
| A. | Phellogen |
| B. | Intrafascicular cambium |
| C. | Interfascicular cambium |
| D. | Intercalary meristem |
| Answer» B. Intrafascicular cambium | |
| 2317. |
The cell wall is impermeable to water and deposition of suberin is also found in [CPMT 1998] |
| A. | Bast |
| B. | Cork |
| C. | Bark |
| D. | Xylem |
| Answer» C. Bark | |
| 2318. |
Secondary growth is absent in [CPMT 1998] |
| A. | Hydrophytes |
| B. | Mesophytes |
| C. | Halophytes |
| D. | Xerophytes |
| Answer» B. Mesophytes | |
| 2319. |
Girth of a dicot stem is increased by [CET Pune 1998] |
| A. | Xylem |
| B. | Cambium |
| C. | Phloem |
| D. | Ground tissue |
| Answer» C. Phloem | |
| 2320. |
Which of the following is a secondary meristem [CET Pune 1998] |
| A. | Phelloderm |
| B. | Primary cambium |
| C. | Cork cambium |
| D. | Promeristem |
| Answer» D. Promeristem | |
| 2321. |
Cork cambium is otherwise called [EAMCET 1993; RPMT 1997; CPMT 1999; Haryana PMT 2005] |
| A. | Phellem |
| B. | Phelloderm |
| C. | Periderm |
| D. | Phellogen |
| Answer» E. | |
| 2322. |
The collective name for cork cambium and phelloderm is [Kashmir MEE 1995] |
| A. | Phellogen |
| B. | Periderm |
| C. | Endoderm |
| D. | Secondary tissue |
| Answer» C. Endoderm | |
| 2323. |
Which will decay faster if exposed freely [CBSE PMT 1993] |
| A. | Soft wood |
| B. | Heart wood |
| C. | Sap wood |
| D. | Wood with lots of fibres |
| Answer» B. Heart wood | |
| 2324. |
Secondary growth or increase in diameter is due to [RPMT 1990] |
| A. | Ground meristem |
| B. | Procambium |
| C. | Cork and phelloderm |
| D. | Vascular cambium |
| Answer» E. | |
| 2325. |
Which of the following are derived from the secondary meristems |
| A. | Wood |
| B. | Phellem |
| C. | Phelloderm |
| D. | All the above |
| Answer» E. | |
| 2326. |
Lenticels are found in [RPMT 1995] |
| A. | Young dicot stem |
| B. | Old dicot stem |
| C. | Monocot root |
| D. | Young root |
| Answer» C. Monocot root | |
| 2327. |
Commercial cork is obtained from [CPMT 1980; BHU 2003] |
| A. | Mango |
| B. | Oak (Quercus suber) |
| C. | Ficus religiosa |
| D. | Pinus |
| Answer» C. Ficus religiosa | |
| 2328. |
One cannot age a tree by its rings if that tree is located in which of the following forests |
| A. | Tropical deciduous |
| B. | Tropical evergreen |
| C. | Temperate deciduous |
| D. | Temperate evergreen |
| Answer» C. Temperate deciduous | |
| 2329. |
Lenticels are formed in bark, which are |
| A. | Aerating pores |
| B. | Made up of phloem |
| C. | Made up of xylem |
| D. | Found in monocot plants |
| Answer» B. Made up of phloem | |
| 2330. |
Cork is a derivative of [CBSE PMT 1988; BHU 1982] |
| A. | Cork cambium (phellogen) or extra fascicular cambium |
| B. | Vascular cambium |
| C. | Fascicular cambium |
| D. | Interfascicular cambium |
| Answer» B. Vascular cambium | |
| 2331. |
Other names of secondary cortex, cork cambium and cork are |
| A. | Phellem, phelloderm and phellogen |
| B. | Phellogen, phellem and phelloderm |
| C. | Phelloderm, phellogen and phellem |
| D. | Phellogen, phelloderm and phellem |
| Answer» D. Phellogen, phelloderm and phellem | |
| 2332. |
After the secondary growth the youngest layer of secondary phloem in a dicot stem is located [CPMT 1980] |
| A. | Just outside the vascular cambium |
| B. | Just inside the vascular cambium |
| C. | Just inside the primary phloem |
| D. | Just outside the secondary xylem |
| Answer» B. Just inside the vascular cambium | |
| 2333. |
Each annual growth ring has |
| A. | An inner layer and an outer layer |
| B. | A single layer of xylem elements |
| C. | Uniform layer of xylem elements |
| D. | Many layers of xylem elements |
| Answer» B. A single layer of xylem elements | |
| 2334. |
The number of cambial strands in vascular bundle of Cucurbita is |
| A. | Two |
| B. | Three |
| C. | One |
| D. | Four |
| Answer» B. Three | |
| 2335. |
If the heart wood region of plant is removed or decays |
| A. | Root will die first |
| B. | Shoot will die first |
| C. | Root and shoot die together |
| D. | Neither root nor shoot will die |
| Answer» E. | |
| 2336. |
Ring bark is present in |
| A. | Acer rebrum |
| B. | Pyrus communis |
| C. | Betula utilis |
| D. | Carya ovate |
| Answer» D. Carya ovate | |
| 2337. |
The waxy substance associated with cell walls of cork cells is or cork cells are impervious to water because of the presence or what is deposited on cork cells [CPMT 1981, 90; CBSE PMT 1994; AFMC 1985; DPMT 1990; MP PMT 2000; AIIMS 2004] |
| A. | Cutin |
| B. | Suberin |
| C. | Lignin |
| D. | Hemicellulose |
| Answer» C. Lignin | |
| 2338. |
Vascular cambium is a meristematic layer that cuts off [CBSE PMT 1990] |
| A. | Primary xylem and primary phloem |
| B. | Xylem vessels and xylem tracheids |
| C. | Primary xylem and secondary xylem |
| D. | Secondary xylem and secondary phloem |
| Answer» E. | |
| 2339. |
Stem and roots of cruciferae grow due to activity of |
| A. | Cortex |
| B. | Cambium |
| C. | Phloem |
| D. | Endoderm |
| Answer» C. Phloem | |
| 2340. |
The function of cork cambium (phellogen) is to produce [CPMT 1981, 84; AFMC 1985] |
| A. | Cork and secondary cortex |
| B. | Secondary xylem and secondary phloem |
| C. | Cork |
| D. | Secondary cortex and phloem |
| Answer» B. Secondary xylem and secondary phloem | |
| 2341. |
The tissue made up of thin-walled rectangular cells responsible for the secondary growth is |
| A. | Cortex |
| B. | Xylem |
| C. | Cambium |
| D. | Pith |
| Answer» D. Pith | |
| 2342. |
In summer, cambium |
| A. | Dies |
| B. | Is more active |
| C. | Is less active |
| D. | Is not active |
| Answer» E. | |
| 2343. |
The lateral roots generally originate in [DPMT 2003] |
| A. | Endodermal cells lying against phloem |
| B. | Cortex |
| C. | Pericycle cells lying against protoxylem |
| D. | Cork cambium |
| Answer» D. Cork cambium | |
| 2344. |
Intrafascicular cambium is situated in [BVP 2003] |
| A. | Outside the vascular bundles |
| B. | In medullary rays |
| C. | Inside the vascular bundles |
| D. | In between the vascular bundles |
| Answer» D. In between the vascular bundles | |
| 2345. |
Which of the following tissues originate from ray initials of a cambium |
| A. | Vascular rays |
| B. | Tracheids and vessels |
| C. | Xylem and phloem fibres |
| D. | Sieve tube and companion cells |
| Answer» B. Tracheids and vessels | |
| 2346. |
In a stratified cambium, the fusiform initials are [CBSE PMT 1994] |
| A. | Long and overlap each other at the ends |
| B. | Short and overlap each other at the ends |
| C. | Short and arranged in horizontal tiers |
| D. | Short or long and overlap each other at the ends |
| Answer» D. Short or long and overlap each other at the ends | |
| 2347. |
The axillary buds arise [DPMT 1990] |
| A. | Endogenously from the pericycle |
| B. | Exogenously from the tissues of the main growing point |
| C. | Endogenously from the cambial tissues |
| D. | Exogenously from the innermost cortex |
| Answer» E. | |
| 2348. |
As a tree grows older, which increases rapidly in thickness [DPMT 1990] |
| A. | Its heart wood |
| B. | Its cortex |
| C. | Its sap wood |
| D. | Its phloem |
| Answer» B. Its cortex | |
| 2349. |
In roots and stems, secondary growth takes place after the formation of [Bihar MDAT 1992] |
| A. | Cambium |
| B. | Sclerenchyma |
| C. | Cork |
| D. | Bark |
| Answer» B. Sclerenchyma | |
| 2350. |
The total time in which growth occurs is called [CPMT 1987] |
| A. | Phase of maturation |
| B. | Phase of cell division |
| C. | Phase of elongation |
| D. | Grand period of growth |
| Answer» E. | |