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Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - NEET MCQ


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20 Questions MCQ Test Biology Class 11 - Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT)

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Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 1

In (i) protoxylem lies towards periphery and metaxylem lies towards centre. Such an arrangement of primary xylem is called as (ii)

Detailed Solution for Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 1

In exarch condition of xylem, protoxylem or the first formed xylem is present towards the periphery while metaxylem or later formed xylem is present towards the centre of the root. Such an arrangement can be seen in roots.

Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 2

Casparian strips are the bands of thickenings present on  _____ walls of endodermis.

Detailed Solution for Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 2

Endodermis is the innermost layer of cortex that consistws of tightly packed barrel shaped cells. It is called starch sheath in case of dicot stems. Radial and and tangential walls of endodermal cells possess thickenings of lignin, suberin and cutin in the form of strips or bands, which are known as casparian bands or casparian strips.

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Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 3

Which plant part possesses polyarch condition of vascular bundles with a well developed pith?

Detailed Solution for Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 3

vascular bundles in monocot roots are radial, polyarch and exarch. Large number (more than 6) of xylem and phloem groups alternate with each other. A well devloped pith is present in monocot root. 

Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 4

Hypodermis is _______ in sunflower stem and _______in maize stem.

Detailed Solution for Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 4

In a dicot stem (e.g., In sunflower), hypodermis is made up of collenchyma, which may be green. In monocot stem  (e.g., maize), hypodermis is formed of non green sderenchyma tissue.

Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 5

Select the incorrect statement regarding the anatomy of a typical monocotyledonous stem.

Detailed Solution for Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 5

Ground tissue of a monocot stem is a mass of similar cells which does not show distinction into cortex, endodermis, pericycle, pith, etc.

Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 6

Refer the given figure which represents a section of vascular bundle as seen in T.S. of a monocot stem and select the option that correctly labels A, B, C and D.

Detailed Solution for Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 6

A monocot stem lacks secondary growth. The vascular bundles are oval or rounded in outline. They contain both phloem and xylem. Phloem lies towards the outside and the xylem on the inner side. Cambium is absent as the whole procambium is consumed in the formation of vascular tissues. Xylem is in the form of letter Y. It is endarch, i.e., protoxylem lies towards the centre of the stem. Xylem is made up of vessels, tracheids, xylem parenchyma and a few xylem fibres. Metandem generally consists of two large oval or rounded vessels lying at the upper two angles of xylem. Protoxylem cavity is present at the end of protoxylem vessels. 

Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 7

Well develped pith is found in

Detailed Solution for Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 7

In a dicot stem, a well developed pith (made of parenchymatous or occasionally sclerenchymatous cells) is present whereas in a monocot stem, pith is absent. In a dicot root, pith is poorly developed whereas in a monocot root, a well developed pith is present.

Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 8

In a dorsiventral leaf, location of palisade tissue and phloem is respectively on the______ surfaces.

Detailed Solution for Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 8

Dorsiventral (bifacial) leaves are commonly horizontal in orientation with distinct upper (adaxial) and lower (abaxial) surfaces. Mesophyll is distinguishable into palisade and spongy tissues with palisade usually restricted to the upper (adaxial) side. Vascular bundles are conjoint and collateral i.e., they possess both xylem and phloem which lie on the same radius. Xylem lies towards the upper (adaxial) side of leaf while phloem lies towards the lower (abaxial) side of leaf. Most of the dicotyledonous leaves are dorsiventral.

Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 9

Which of the following conditions of xylem is present in both monocot and dicot stems?

Detailed Solution for Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 9

Based on position of protoxylem in relation to metaxylem, the xylem may be exarch/centripetal, endarch/centrifugal, mesarch and centerarch. In endarch condition, protoxylem lies on the inner side of metaxylem e.g., dicot and monocot stems.

Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 10

Study the following statements regarding the anatomy of Isobllateral leal.
(i) Stomata are equally distributed on both the surfaces.
(ii) Certain adaxlal epidermal cells are modified Into bulllform cells in grasses.
(iii) The vascular bundles are radial.
(iv) Phloem is adaxially placed.
Which of the above statements are correct?

Detailed Solution for Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 10

In an isobilateral (equifacial) leaf, vascular bundles are conjoint and collateral. Xylem lies towards the adaxial (upper) side and phloem lies towards abxialal (lower) side of leaf.

Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 11

Bundle sheath extensions in a dicot leaf and in a monocot leaf are ________ and ________ respectively.

Detailed Solution for Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 11

In dicot leaf, bundle sheath is generally single layered and formed of colourless cells. Bundle sheath extensions are parenchymatous. In monocot leaf, bundle sheath may be single or double layered and the cells generally possess chloroplasts. Bundle sheath extensions are sderenchymatous.

Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 12

Stele includes

Detailed Solution for Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 12

Word 'stele' is taken from Greek language, which means 'pillar'. Stele consists of pericycle, vascular bundles (xylem and phloem) and pith (if present).

Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 13

What type of parenchyma is situated below the palisade cells in leaf anatomy?

Detailed Solution for Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 13

Below the palisade layer, there is a layer of cells known as the spongy parenchyma. These cells are characterized by having air spaces between them, which allows for the exchange of gases, such as carbon dioxide and oxygen, as well as the movement of water vapor within the leaf. The spongy parenchyma plays a crucial role in facilitating gas exchange and regulating water vapor in the leaf, which are essential processes for photosynthesis and transpiration

Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 14

What type of tissue surrounds each vascular bundle in a monocot stem?

Detailed Solution for Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 14

The monocot stem has a large number of scattered vascular bundles, and each vascular bundle is surrounded by a sclerenchymatous bundle sheath. This sclerenchymatous bundle sheath acts as a protective layer around the vascular bundle.

Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 15

Read the following statements with 1-2 blanks in each one of them.
(i) In monocot root, a large number of vascular bundles are arranged in the form of a _____ around the cent
(ii) Due to the presence of  the endodermal cells do not allow wall to wall movement of substances between cortex and peticyde, in a primary dicot toot.
(iii) The epidermis of stem of sunflower beats several unbranched ________ hair.
(iv) The central portion of a dicot stem is usually occupied by ________ comprising of thin walled parenchymatous cells.

Fill in the blanks in the above statements and select the correct option for any two of them.

Detailed Solution for Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 15

In monocot root, a large number of vascular bundles are arranged in the form of a ring around the central pith.
Due to the presence of casparian strips, the endodermal cells do not allow wall to wall movement of substances between cortex and pericyde, in a primary dicot root.

Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 16

Vascular bundle is enclosed with in a well developed sderenchymatous sheath in

Detailed Solution for Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 16

In most monocot stems, a sclerenchymatous bundle sheath is generally present on the outside of each vascular bundle.

Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 17

A typical monocotyledonous root is characterized by

Detailed Solution for Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 17

There is no such distinction between a young and an old root of monocotyledonous plant. This is due to the absence of secondary growth in the monocot roots. The centre of monocot root is occupied by the pith. It consists of parenchymatous cells which may be rounded or angular. Intercellular spaces are present amongst the pith cells. The pith cells store food. Xylem and phloem bundles are numerous and are 8 or more in number. Xylem vessels are oval or rounded.

Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 18

Read the following statements.
(i) Multicellular epidermal hair
(ii) Collenchymatous hypodermis
(iii) Pith present
(iv) Vascular bundles present in a ring i.e. eustele

Above given features describe which of the following plant parts?

Detailed Solution for Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 18

The epidermis of dicot stem bears several unbranched multicellular hair or trichomes. The hypodermis is made of 3−4 layered sub-epidermal collenchyma tissue. Vascular strand is in the form of eustele or a ring of vascular bundles present around the central pith and inner to the pericycle.

Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 19

Read the following statements and select the correct option.
Statement 1 : Anatomically, all the tissues present on the inner side of endodermis such as pericyde, vascular bundles and pith constitute the stele.
Statement 2 : Eustele is the stele in which vascular bundles are arranged in the form of a ring as present in dicot stems.

Detailed Solution for Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 19

The term stele was coined by Van Tiegham and Dauliot (1886). It is the axial portion of plant axis. Anatomically, all the tissues on the innerside of endodermis such as pericyde, vascular bundles and pith constitute the stele. Eustele is the type of stele in which a ring of vascular bundles is present around the central pith and inner to the pericyde e.g., dicot stem. Stele containing irregularly scattered vascular bundles is called atactostele, e.g., monocot stem. Pteridophytes are the first plants possenssing stele.

Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 20

Where is the phloem usually located in conjoint vascular bundles found in stems and leaves?

Detailed Solution for Test: Anatomy of Dicotyledonous & Monocotyledonous Plants (NCERT) - Question 20

In conjoint vascular bundles, which are common in stems and leaves, the phloem is typically located on the outer side of the xylem. This arrangement ensures efficient transport of food (sugars produced in the leaves) through the phloem, which is situated closer to the outer part of the stem or leaf where sugars are needed for growth or storage.

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