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4

The given figures are types of elements (A and B) which constitute one type of complex tissue (c) of a plant . Identify A, B and C.

A. A Tracheid, B Vessel, C Xylem

B. A Vessel, B Tracheild, C Phloem

C. A Fibre, B Tracheid, C Bark

D. A Fibre, B Sclereid, C Casparian strips

Correct Answer :

A. A Tracheid, B Vessel, C Xylem


The given figures A (tracheid) and B (vessel) are types of xylem (C). Xylem is the vascular tissue in plants which conducts water and dissolved nutrients upwards from the root and also helps to form the woody element in the stem. It consists of tracheids, vessels, parenchyma cells, and woody fibres. Tracheid is an elongated, tapering xylem cell having lignified, and pitted, intact walls which lacks perforations in the cell wall. Tracheids have pits where the cell wall is modified into a thin membrane, across which water flows from tracheid to tracheid. The cells die when mature, leaving only their lignified cell walls. Tracheids are found in all vascular plants. It is adapted for conduction and support. Vessels are a long straight chain made of tough long dead cells known as vessel elements or vessel members. The vessel cells, devoid of protoplasm, are arranged end to end and the cell walls have disappeared. This makes a tube. They have a lignified cell wall and a large central cavity.

Related Questions

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4

An organised and differentiated cellular structure having cytoplasm but no nucleus is called _________.

A. vessels

B. xylem parenchyma

C. sieve tubes

D. tracheids

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4

Sclerenchyma usually___________and_____________ protoplasts.

A. live, without

B. dead, with

C. live, with

D. dead, without

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4

Tissues are classified into two main groups, namely meristematic and permanent tissues on the basis of

A. whether the cells being able to divide or not.

B. position of the cells.

C. whether they are living or dead.

D. none of the above

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4

In stems, the protoxylem lies towards the _____________ and the metaxylem lies towards the ____________ of the organ.

A. centre; periphery

B. periphery; centre

C. periphery; periphery

D. centre; centre

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4

Xylem functions as a conducting tissue for water and minerals from _________to the ______and__________.

A. roots, stems, leaves

B. stems, roots, leaves

C. leaves, stems, roots

D. leaves, stems, leaves

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4

Which of the following pair of match is not correct?

A. Pith - Large and well developed in monocotyledonous root.

B. Root hairs - Helps in preventing water loss due to transpiration

C. Sieve tube elements - Its functions are controlled by the nucleus of companion cells.

D. Stomatal apparatus - Consists of stomatal aperture, guard cells and surrounding subsidiary cells

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4

Apical, intercalary and lateral meristems are differentiated on the basis of

A. origin

B. function

C. position

D. development

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4

In an experiment, a student cut a transverse section of young stem of a plant which he has taken from his school garden.
After observing it under the microscope how would he ascertain whether it is a monocot stem or a dicot stem?

A. With the help of bulliform cells.

B. With the help of casparian strips.

C. With the help of vascular bundles.

D. With the help of stomatal apparatus.

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4

Cambium is considered as a lateral meristem because

A. it gives rise to lateral branches.

B. it causes increase in girth.

C. it increases height and diameter of a plant.

D. it adds bulk to a plant.

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4

Match the terms given in column I with their funciton given in column II and choose the correct option.
Column-IColumn-II
(Term)(Functions)
A. MeristemI. Photosynthesis, storage
B. ParenchymaII. Mechanical support
C. CollenchymaIII. Actively dividing cells
D. SclerenchymaIV. Stomata
E. Epidermal tissueV. Sclereids

A. A I, B III, C V, D II, E IV

B. A III, B I, C II, D V, E IV

C. A II, B IV, C V, D I, E III

D. A V, B IV, C III, D II, E I

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4

Choose the correct labelling of (A J) in the given figure of T.S. of monocot root.

A. A Root hair, B Epiblema, C Cortex, D Endodermis, E Passage cell, F Pericycle, G Pith, H Phloem, I Metaxylem.

B. A Root hair, B Epiblema, C Cortex, D Endodermis, E Passage cell, F Pith, G Pericycle, H Metaxylem, I Phloem.

C. A Root hair, B Epiblema, C Cortex, D Endodermis, E Pericycle, F Phloem, G Protoxylem, I Metaxylem

D. A Root hair, B Cortex, C Epiblema, D Pericycle, E Endodermis, F Pith, G Phloem, H Protoxylem, I Metaxylem

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4

In the given figure of phloem tissue, identify the marked part (A, B and C) which help in maintaining the pressure gradient
in the sieve tubes.

A. A

B. B

C. C

D. None of the above

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4

A student was given a tissue to observe under the microscope. He observes the tissue and concludes that the tissue is a type of simple plant tissue and provides mechanical support to young stem and petiole of leaf.
Identify the tissue.

A. Parenchyma

B. Collenchyma

C. Sclerenchyma

D. Xylem parenchyma

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4

Various functions like photosynthesis, storage, excretion performed by _____________.

A. sclerenchyma

B. parenchyma

C. collenchyma

D. aerenchyma

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4

The given figure shows the T.S of dicot root. Some parts are marked as A, B, C, D, E, & F. Choose the option which shows the correct labelling of marked part.

A. A Epiblema, B Root hair, C Cortex, D Endodermis, E Pith, F Pericycle

B. A Cortex, B Pith, C Epiblema, D Endodermis, E Root hair, F Pericycle

C. A Epiblema, B Endodermis, C Cortex, D Root hair, E Pith, F Pericycle

D. A Cortex, B Epiblema, C Pith, D Endodermis, E Root hair, F Pericycle

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4

Identify A, B and C in the given figure of shoot apical meristem

A. A Leaf primordium, B Shoot apical meristem, C Axillary bud

B. A Leaf primordium, B Shoot apical meristem, C Apical bud

C. A Root hair primordium, B Root apical meristem, C Axillary bud

D. A Root hair primordium, B Root apical meristem, C Terminal bud

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4

The given figure shows T.S. of monocot stem. Identify the correct labelling of A to F marked in the given figure.

A. A Epidermis, B Hypodermis, C Vascular bundles, D Phloem, E Xylem, F Ground tissue

B. A Cuticle, B Epidermis, C Sclerenchymatous sheath, D Sclerenchymatous hypodermis, E Parenchymatous sheath, F Phloem

C. A Cuticle, B Epidermis, C Sclerenchymatous hypodermis, D Sclerenchymatous sheath, E Parenchymatous sheath, F Phloem

D. A Cuticle, B Epidermis, C Sclerenchymatous hypodermis, D Sclerenchymatous sheath, E Parenchymatous sheath, F Protoxylem

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4

As secondary growth proceeds, in a dicot stem, the thickness of

A. sapwood increases.

B. heartwood increase.

C. both sapwood and heartwood increases.

D. both sapwood and heartwood remains the same.

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4

The length of different internodes in a culm of sugarcane is variable because of

A. size of leaf lamina at the node below each internode

B. intercalary meristem

C. shoot apical meristem

D. position of axillary buds

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4

Sieve tubes are suited for translocation of food because they possess

A. bordered pits.

B. no ends walls.

C. broader lumen and perforated cross walls.

D. no protoplasm.

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4

Main function of lenticel is

A. transpiration

B. guttation

C. gaseous exchange

D. both (a) & (c)

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4

Trees at sea do not have annual rings because

A. soil is sandy.

B. there is climatic variation.

C. there is no marked climatic variation.

D. there is enough moisture in the atmosphere.

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4

T.S. of monocot leaf is given below, certain parts have been marked by alphabets (A G). Which one is the option showing there correct labelling?

A. A Adaxial epidermis, B Xylem, C Mesophyll, D Sub-stomatal cavity, E Abaxial epidermis, F Stoma, G Phloem

B. A Adaxial epidermis, B Abaxial epidermis, C Xylem, D Sub-stomatal cavity, E Stoma, F Mesophyll, G Phloem

C. A Adaxial epidermis, B Phloem, C Mesophyll, D Sub-stomatal cavity, E Abaxial epidermis, F Xylem, G Stoma

D. A Adaxial epidermis, B Xylem, C Stoma, D Substomatal cavity, E Abaxial epidermis, F Phloem, G Mesophyll

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4

The vessel elements of angiosperms differ from other elements of xylem in having

A. simple pits on their radial walls.

B. bordered pits on their lateral walls.

C. simple and bordered pits on their end walls.

D. simple perforation on their end walls.

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4

During the formation of leaves and elongation of stem, some cells left behind from the shoot apical meristem, constitute the

A. lateral meristem

B. axillary bud

C. cork cambium

D. fascicular cambium

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4

Cells of permanent tissues are specialized

A. functionally.

B. only structurally.

C. both structurally and functionally.

D. for mitosis.

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4

Some vascular bundles are described as open because these

A. are surrounded by pericycle but not endodermis.

B. are capable of producing secondary xylem and phloem.

C. possess conjunctive tissue between xylem and phloem.

D. are not surrounded by pericycle.

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4

The given figure shows the secondary growth in a dicot stem. Their parts are marked as A, B, C, D, E & F. Choose the correct labelling of the parts marked as A to F.

A. A Phellem, B Phellogen, C Medullary rays, D Secondary xylem, E Secondary phloem, F Cambium ring

B. A Phellem, B Phellogen, C Medullary rays, D Secondary phloem, E Secondary xylem, F Cambium ring

C. A Phellogen, B Phellem, C Medullary rays, D Secondary xylem, E Secondary phloem, F Cambium ring

D. A Phellem, B Phellogen, C Cambium ring, D Secondary xylem, E Secondary phloem, F Medullary rays

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4

Read the following statements and answer the question.
  1. Cambium is very active and produces a large number of xylary elements having vessels with wider cavities.
  2. It is also called early wood.
  3. 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

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4

The given figure shows apical meristem of root apex with few part marked as A, B and C. Identify the correct labelling of A, B and C.

A. A Vascular structure, B Protoderm, C Root cap

B. A Cortex, B Endodermis, C Root cap

C. A Cortex, B Protoderm, C Root cap

D. A Tunica, B Protoderm, C Root cap