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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 601. |
What is the location of the oldest and youngest layers of secondary pholem in a dicot stem? |
| Answer» The secondary pholem develops just outside the vascular cambium and inside the primary pholem. Hence, its oldest lies below the primary pholem and youngest layer lies above in the vascular cambium as secondary pholem grows from vascular cambium towards primary pholem. | |
| 602. |
What is the role of pericycle in secondary growth of dicot roots? |
| Answer» The cells of pericycle lying opposite to the protoxylem divide to give rise to vascular cambium alongwith the parenchyma cells lying below the pholem patches. It forms a complete and continuous wavy cambial ring. Pericycle gives rise to lateral roots also. | |
| 603. |
What is the position of oldest secondary phloem ?A. Just outside the pericycleB. Just outside the vascular cambiumC. Just below the pericycleD. Below the vascular cambium |
| Answer» Correct Answer - C | |
| 604. |
Secondary medullary rays are produced byA. Fusiform initialB. Interfascicular ambiumC. PhellogenD. Ray initial |
| Answer» Correct Answer - D | |
| 605. |
Heart woodA. It the oldest secondary xylem ringB. Lies near pithC. Is nonfunctionalD. All of these |
| Answer» Correct Answer - D | |
| 606. |
The casparian strips are present on the plant cells of roots which areA. Bean-shapedB. Dubm-bell shapedC. Barrel-shapedD. Lens-shaped |
| Answer» Correct Answer - C | |
| 607. |
The conjunctive tissue lies between theA. Xylem and pholemB. Pericycle and endodermisC. Epidermis and cotrexD. Epidermis and hypodermis |
| Answer» Correct Answer - A | |
| 608. |
The meristerms that develop during later stages of plant growthA. promeristemsB. primary meristemsC. secondary meristemsD. Both (a) and (c ) |
| Answer» Correct Answer - C | |
| 609. |
Collenchyma isA. Living with no reserve foodB. Living with protoplasmC. Dead and hollowD. none of the above |
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Answer» Correct Answer - B Collenchyma is living with protoplasm. |
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| 610. |
The intercalary meristerms are infact portions ofA. Lateral meristemsB. Secondary meristemsC. Apical meristemsD. Permanent tissues that become meristematic |
| Answer» Correct Answer - C | |
| 611. |
Select the characters which are not applicable to the anatomy of dicot roots. I. Conjunctive tissue present. II. Presence of protein compounds in casparian strips. III. Polyarch xylem bundles. IV. Presence of pericycle.A. I and IIB. II and IVC. III and IVD. II and III |
| Answer» Correct Answer - D | |
| 612. |
Which of the following tissue makes phellogen during the secondary growth in dicot roots?A. EndodermisB. HypodermisC. EpidermisD. Pericycle |
| Answer» Correct Answer - D | |
| 613. |
Root cap is not found inA. HollyhockB. PistiaC. SunflowerD. China rose |
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Answer» Correct Answer - B Pistia is a aquatic plant in which roots are not well developed. |
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| 614. |
After preparing a transverse section out of a cut piece of a plant axis, it was seen that it has a C shaped open arch of endarch collateral vascular bundles with secondary growth. This indicates that it is a transverse section ofA. A dicotyledonous petioleB. A dicot stem at the nodeC. A dicot root at the point where a root branch is coming outD. A phylloclade |
| Answer» Correct Answer - A | |
| 615. |
Which of the following is not a part of epidermal tissue systemA. TrichomesB. Companion cellsC. Guard cellsD. Subsidiary cells |
| Answer» Correct Answer - B | |
| 616. |
Which of the following is not a part of epidermal tissue systemA. Companion cellsB. TrichomesC. Root hairsD. Guard cells |
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Answer» Correct Answer - A Companion cells are characteristic element of phloem tissue associated with the sieve tubes in the angiosperms. They are absent in pteridophytes and gymnosperms. |
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| 617. |
Medullary rays are made up ofA. Parenchymatous cellsB. Sclerenchymatous cellsC. TracheidsD. Fibres |
| Answer» Correct Answer - A | |
| 618. |
Identify the plants (from the list i-vi) which possess the given type of guars cells (as shown in the diagram) in their leaves. (i). Grass (ii). Tomato (iii). Banana (iv). BrinjalA. (i),(ii) and (v)B. (ii), (iii) and (iv)C. (i),(iii) and (vi)D. (iv),(v) and (vi) |
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Answer» Correct Answer - C The guard cells shown in the figure are dump-bell shaped guard cells. These are mainly found in monocots such as grasses, banana and lily. |
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| 619. |
Select the mismatched pairA. collateral and open vascular bundles- sunflower stemB. Bicollateral vascular bundles-Maize stemC. Concentric vascular bundles -fernsD. Radial vascualr bundles -maize root |
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Answer» Correct Answer - B Bicollateral vascular bundles have phloem both on the outer and inner side of xylem. All the three lie on the same radiau usually a strip of vascular cambium is present on both outer and inner sides of xylem. Bicollateral vascular bundles occur in cucurbitaceae (e.g., pumpkin or cucurbita pepo, Ridge gourd or Luffa cyliderica) and some members of families solanaceae, Convolvulaceae, etc. |
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| 620. |
Cuticle is secreted byA. EpidermisB. EndodermisC. Both (a) and (b)D. Hypodermis |
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Answer» Correct Answer - A Waxy outermost lining. Which is secreted by epidermis. |
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| 621. |
Lignin is the important constituent in the cell wall ofA. PhloemB. ParenchymaC. XylemD. Cambium |
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Answer» Correct Answer - C Most of the xylem cells have deposition of lignin on their cell wall. |
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| 622. |
Epidermal tissue system is derived fromA. protodermB. procambiumC. periblemD. plerome |
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Answer» Correct Answer - A Protoderm (Gk. Protos-first, derma-skin) in the outer layer of apical meristem that given rise to epidermal tissues epidermal tissue system is derived from protoderm. Ground tissue system is derived partly from periblem and partly from plerome. Vascular tissue system is derived from procambium. |
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| 623. |
In a dicotyledonous stem, the sequence of tissues from the outside to the inside isA. Phellem-Percycle-Endodermsi-PhloemB. Phellem-Phloem-Endodermis-PericycleC. Phellem-Endodermsi-Percycle-PhloemD. Pericycle-Phellem-Endodermis-Phloem |
| Answer» Correct Answer - C | |
| 624. |
hypodermis in monocotyledonous stem isA. ParenchymatousB. ChlorenchymatousC. CollenchymatousD. Selerenchymatous |
| Answer» Correct Answer - D | |
| 625. |
in a dorsiventral leaf, protoxylem and metaxlem are located respectivelyA. Abaxial and adaxial sidesB. Adaxial and abxial sidesC. Adaxial and adaxial sidesD. Abaxial and abaxial sides |
| Answer» Correct Answer - B | |
| 626. |
Collenchyma cells are absent in the stems and leaves of many monocotyledonous plants. It is so becauseA. they do not need any mechanical supportB. dedifferentiate into secondary meristem in the early stageC. their wall thickening get dissolved, hence not easy to be identifiedD. sclerenchyma appears at an early stage of development |
| Answer» Correct Answer - D | |
| 627. |
"Sap wood" is otherwise calledA. DuramenB. AlburnumC. PithD. Medullary rays |
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Answer» Correct Answer - B Alburnum is an outer light coloured zone called the sap wood which are physiologically active. |
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| 628. |
Pericycle in roots is responsible forA. The formation of lateral rootsB. Providing mechanical supportC. The formation of vescular bundle from cortexD. The formation of vascular bundle from endodermis |
| Answer» Correct Answer - A | |
| 629. |
monocot stem hasA. Bicollateral closed vascular bundlesB. Bicollateral open vascular bundlesC. Collateral apen vascular bundlesD. Collateral closed bascular bundles |
| Answer» Correct Answer - D | |
| 630. |
P-protein occurs inA. Sieve tube elementsB. TracheidsC. VesselsD. Phloem parchyma |
| Answer» Correct Answer - A | |
| 631. |
In monocot roots which types of vascular bundles are foundA. Collateral, conjoint, and closedB. Radial vascular bundles with exarch xylemC. Bicollateral, conjoint, and closedD. Radial vescular bundles with endarch xylem |
| Answer» Correct Answer - B | |
| 632. |
Vascular bundles are scattered inA. BryophytesB. Dicot rootC. Dicot stemD. Monocot stem |
| Answer» Correct Answer - D | |
| 633. |
Collenchyma isA. Living with no reserve foodB. Living with protoplasmC. Dead and hollowD. Dead with reserve food |
| Answer» Correct Answer - B | |
| 634. |
Reduction in vascular tissue mechanical tissue and cuticle is characteristic ofA. HydrophytesB. XerophytesC. MesophytesD. Epiphytes |
| Answer» Correct Answer - A | |
| 635. |
Y-shaped arrangment of xylem vessel is found inA. monocot stemB. dicot stemC. monocot rootD. dicot root. |
| Answer» Correct Answer - A | |
| 636. |
Bicollateral vascular bundles are found inA. HelianthusB. Zea maysC. CucurbitaD. Dracaena |
| Answer» Correct Answer - C | |
| 637. |
Conjoint, collateral and closed vascular bundle is found inA. Monocot stemB. Monocot rootC. Dicot stemD. Dicot root |
| Answer» Correct Answer - A | |
| 638. |
In pteridophyta and gymnosperms which cells are present in place of companion cellA. SclereidsB. Albuminous cellsC. IdioblastsD. None of these |
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Answer» Correct Answer - B Albuminous cells : These cells are storage cells which are found in pteridophytes and gymnosperms stem, they store minerals as well as starch. |
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| 639. |
A group of cells alike in form, function and origin is calledA. OrganB. OraganellaC. TissueD. None of these |
| Answer» Correct Answer - C | |
| 640. |
Which pair has lignin in both?A. Tracheid and collenchymaB. Sclerechyma and sieve tubeC. Sclerenchyma and tracheidsD. Parenchyma and endodermis |
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Answer» Correct Answer - C Sclerenchyma sand tracheids has lignihn in their wall |
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| 641. |
A mature sieve tube differs from vessel inA. Being nearly deadB. Lacking cytoplasmC. Lacking a functional nucleusD. Absence of lignified walls |
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Answer» Correct Answer - D The walls of vessels are lignified and hard and not very thick. Sieve tubes have thin cellulose walls. |
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| 642. |
Shoot apical meristen is found on the tip ofA. PlumuleB. RadicleC. RootD. Apex |
| Answer» Correct Answer - A | |
| 643. |
Find out the wrong statement about angiosperm rootsA. Apex is protected by root capB. Vascular bundles are collateralC. xylem is centripetal in youn stateD. Cuticle is absent in youn state |
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Answer» Correct Answer - B Angiosperm roots have radial vascualr bundles. |
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| 644. |
A simple mechanical tissue devoid of lignin is Or Which one of the following is an effective tissue of growing orgass with sufficient elasticityA. ParenchymaB. CollenchymaC. SclerenchymaD. Chlorenchyma |
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Answer» Correct Answer - B Collenchyma is never lignified but may possess simple pits. |
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| 645. |
Parenchymatous cells filling the space between dermal and vascular tissue isA. Ground tissueB. Epidermal tissueC. PithD. Vascular bundles |
| Answer» Correct Answer - A | |
| 646. |
All the xylem elements, when mature are dead exceptA. tracheidsB. vesselsC. xylem parenchymaD. xylem fibres |
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Answer» Correct Answer - C Xylem is a complex tissue made up of three types of deadcells (vessels, tracheids and xylem parachyma stores food andhelps in thelateral condcution of water or sap. |
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| 647. |
Which one of the following statements pertaining to plant structure is correctA. Cork lacks stomata, but lenticels carry out transpirationB. Xylem helps in transfer of food from cortex to phloemC. Sieve tube elements possess cytoplasm but no nucleiD. The shoot apical meristem has a quiescent centre |
| Answer» Correct Answer - C | |
| 648. |
Find out the wrong statement about angiosperm rootsA. Cuticle is absent in young stagesB. The apex is protected by root capC. Vascular bundles are collateralD. Xylem is centripetal in growth in the young roots |
| Answer» Correct Answer - C | |
| 649. |
Cork cambium forms tissues that form the cork. Do you agree with this statement? Explain. |
| Answer» When secondary growth occurs in the dicot stem and root, the epidermal layer gets broken. There is a need to replace the outer epidermal cells for providing protection to the stem and root from infections. Therefore, the cork cambium develops from the cortical region. It is also known as phellogen and is composed of thin-walled rectangular cells. It cuts off cells toward both sides. The cells on the outer side get differentiated into the cork or phellem, while the cells on the inside give rise to the secondary cortex or phelloderm. The cork is impervious to water, but allows gaseous exchange through the lenticels. Phellogen, phellem, and phelloderm together constitute the periderm. | |
| 650. |
Parenchymatous tissue is characterised by theA. Presence of unform thickeningB. Presence of thickenning in the cornersC. Presence of intercellular spacesD. Presence of lignified walls |
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Answer» Correct Answer - A The parenchymatous cells are isodiametric (all sides equal) and thinwalled. |
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