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Plant Tissues - 1

Description: This test contaiins 25 multiple choice questions on plant tissues.
Number of Questions: 25
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Tags: parenchyma.collenchyma xylem phloem etc Permanent Tissue Simple Permanent Tissues Meristematic Tissue Combination Combinations
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Tanin and resins are stored by

  1. Parenchyma

  2. Collenchyma

  3. Sclerenchyma

  4. Sclereids


Correct Option: A
Explanation:

Cells are isodiametric, i.e. equally expanded on all sides. They may be oval, round, polygonal or elongated. Nucleus is present and hence, living. The cell walls are thin and made of cellulose. Cytoplasm is dense with a single large vacuole. Intercellular spaces may be present. Parenchyma which contain chlorophyll is called chlorenchyma.  It gives mechanical strength by maintaining turgidity and stores waste products like tanin, gum, crystals and resins.

The pulp of pear and guava becomes gritty because of

  1. Sclerenchyma

  2. Collenchyma

  3. Sclereids

  4. Parenchyma


Correct Option: C
Explanation:

These are special sclerenchymatous cells, found in the cortex, pith, phloem, hard seeds, nuts and stony fruit. The flesh of the pear and guava are sometimes gritty, due to the presence of selereids. These cells are very thick walled, hard and strongly lignified. They are isodiametric, polyhedral, slightly elongated or irregular in shape.

The plant tissue present in nuts and stony fruit is

  1. Sclerenchyma

  2. Parenchyma

  3. Collenchyma

  4. Sclereids


Correct Option: D
Explanation:

These are special sclerenchymatous cells, found in the cortex, pith, phloem, hard seeds, nuts and stony fruit. The flesh of the pear and guava are sometimes gritty, due to the presence of selereids. These cells are very thick walled, hard and strongly lignified. They are isodiametric, polyhedral, slightly elongated or irregular in shape

Sclereids are the modification of

  1. Sclerenchyma

  2. Parenchyma

  3. Collenchyma

  4. None of these


Correct Option: A
Explanation:

Sclereids are special sclerenchymatous cells found in the cortex, pith, phloem, hard seeds, nuts and stony fruit. Sclerenchymatous cells are long, narrow, thick and lignified, usually pointed at both ends. The cell wall is evenly thickened with lignin and sometimes is so thick, that the cell cavity or lumen is absent. Nucleus is absent, and hence the tissue is made up of dead cells.

The stem of hemp, jute and coconut trees is chiefly composed of

  1. Collenchyma

  2. Parenchyma

  3. Sclereids

  4. Sclerenchyma


Correct Option: D
Explanation:

The cells are long, narrow, thick and lignified, usually pointed at both ends. The cell wall is evenly thickened with lignin and sometimes is so thick, that the cell cavity or lumen is absent. Nucleus is absent and hence the tissue is made up of dead cells. They have simple often, oblique pits in the walls. The middle lamella i.e. the wall between adjacent cells is conspicuous. It is found abundantly in stems of plants like, hemp, jute and coconut, their length varying from 1 mm to 550 mm.

Which of the following tissues provides support to the plant by making it rigid, flexible and elastic?

  1. Sclerenchyma

  2. Parenchyma

  3. Collenchyma

  4. Sclereids


Correct Option: A
Explanation:

The cells are long, narrow, thick and lignified, usually pointed at both ends. The cell wall is evenly thickened with lignin and sometimes is so thick that the cell cavity or lumen is absent. Nucleus is absent and hence the tissue is made up of dead cells. They have simple often, oblique pits in the walls. The middle lamella i.e. the wall between adjacent cells is conspicuous. It is found abundantly in stems of plants like, hemp, jute and coconut, their length varying from 1 mm to 550 mm.

The oblique pits are present in the walls of

  1. Parenchyma

  2. Collenchyma

  3. Sclerenchyma

  4. Sclereids


Correct Option: C
Explanation:

The cells are long, narrow, thick and lignified, usually pointed at both ends. The cell wall is evenly thickened with lignin and sometimes is so thick that the cell cavity or lumen is absent. Nucleus is absent and hence the tissue is made up of dead cells. They have simple often, oblique pits in the walls. The middle lamella i.e. the wall between adjacent cells is conspicuous. It is found abundantly in stems of plants like, hemp, jute and coconut, their length varying from 1 mm to 550 mm.

The chlorenchyma is chlorophyll containing

  1. Sclerenchyma

  2. Parenchyma

  3. Collenchyma

  4. Sclereids


Correct Option: B
Explanation:

Cells are isodiametric i.e. equally expanded on all sides. They may be oval, round, polygonal or elongated. Nucleus is present and hence living. The cell walls are thin and made of cellulose. Cytoplasm is dense with a single large vacuole. Intercellular spaces may be present. Parenchyma which contain chlorophyll, are called chlorenchyma. It is found in the cortex of root, ground tissue in stems and mesophyll of leaves.

The mesophyll of leaves is composed of

  1. Collenchyma

  2. Parenchyma

  3. Sclerenchyma

  4. Sclereids


Correct Option: B
Explanation:

Cells are isodiametric i.e. equally expanded on all sides. They may be oval, round, polygonal or elongated. Nucleus is present and hence living. The cell walls are thin and made of cellulose. Cytoplasm is dense with a single large vacuole. Intercellular spaces may be present. Parenchyma which contain chlorophyll are called chlorenchyma.

In plants the turgidity is maintained by

  1. Collenchyma

  2. Sclereids

  3. Sclerenchyma

  4. Parenchyma


Correct Option: D
Explanation:

Cells are isodiametric i.e. equally expanded on all sides. They may be oval, round, polygonal or elongated. Nucleus is present and hence living. The cell walls are thin and made of cellulose. Cytoplasm is dense with a single large vacuole. Intercellular spaces may be present. It gives mechanical strength by maintaining turgidity.

Which among the following is a dead permanent plant tissue?

  1. Collenchyma

  2. Parenchyma

  3. Sclerenchyma

  4. All of these


Correct Option: C
Explanation:

The cells are long, narrow, thick and lignified, usually pointed at both ends. The cell wall is evenly thickened with lignin and sometimes is so thick, that the cell cavity or lumen is absent. Nucleus is absent and hence the tissue is made up of dead cells. They have simple often, oblique pits in the walls. The middle lamella i.e. the wall between adjacent cells, is conspicuous.

Single large vacoule is present in

  1. Collenchyma

  2. Sclerenchyma

  3. Parenchyma

  4. Sclereids


Correct Option: C
Explanation:

Cells are isodiametric i.e. equally expanded on all sides. They may be oval, round, polygonal or elongated. Nucleus is present and hence living. The cell walls are thin and made of cellulose. Cytoplasm is dense with a single large vacuole. Intercellular spaces may be present. It gives mechanical strength by maintaining turgidity.

Which of the following tissues have cell walls composed of cellulose only?

  1. Collenchyma

  2. Sclerenchyma

  3. Sclereids

  4. Parenchyma


Correct Option: D
Explanation:

Cells are isodiametric i.e. equally expanded on all sides. They may be oval, round, polygonal or elongated. Nucleus is present and hence living. The cell walls are thin and made of cellulose only. Cytoplasm is dense with a single large vacuole. Intercellular spaces may be present.

The elongation of the stem is brought by

  1. Collenchyma

  2. Parenchyma

  3. Sclerenchyma

  4. Sclereids


Correct Option: A
Explanation:

The cells are elongated and are circular, oval or polygonal in cross-section. Cell wall is unevenly thickened with cellulose at the corners against the intercellular spaces. Nucleus is present ,and hence the tissue is living. Vacuoles are small. Intercellular spaces are generally absent. If they contain chlorophyll, they are known as chlorenchyma. It provides mechanical support to the stem. Being extensible, these cells readily adapt themselves, to the rapid elongation of the stem.

Which one can be excluded from the features of collenchyma?

  1. Supporting cells

  2. Does not have a secondary wall

  3. Stores waste products

  4. Supports leaf petioles


Correct Option: C
Explanation:

The parrenchyma tissue stores waste products of plants like, tanin, gum, crystals and resins.

Which of the following is not a characteristic feature of cells forming permanent tisues?

  1. Variable cell shape and size

  2. Granular cytoplasm

  3. Prominent vacuoles

  4. None of these


Correct Option: D
Explanation:

All of the above are the characteristic features of cells forming permanent tisues.

The parenchyma with elongated cells having tapering ends is known as

  1. Prosenchyma

  2. Chlorenchyma

  3. Vascular parenchyma

  4. Arenchyma


Correct Option: A
Explanation:

Prosenchyma is a type of parenchyma, where cells are elongated with tapering ends.

Which one is not a characteristic feature of meristamatic tissue?

  1. Smaller cells

  2. Helps in storage and respiration

  3. The cell wall is composed of cellulose only

  4. A conspicuous nucleus


Correct Option: B
Explanation:

Parenchyma is mainly involved in functions, like storage and respiration. It also takes part in other functions like, photosynthesis, absorption, secretion and protection.

The parenchyma having many spiny projections is

  1. Vascular parenchyma

  2. Armed parenchyma

  3. Medullary parenchyma

  4. Conjunctive parenchyma


Correct Option: B
Explanation:

Armed parenchyma is the parenchyma, which is found in the epidermis of leaves, in some gymnosperms. The cells have many spiny projections. It is defensive in function.

The parenchyma present in the root system for storing water is

  1. Medullary parenchyma

  2. Vascular parenchyma

  3. Armed parenchyma

  4. Conjunctive parenchyma


Correct Option: D
Explanation:

Conjunctive parenchyma, is the parenchyma, which occurs in the root system. It is specially meant for storage of water.

The parenchyma lying in between the vascular bundles of the stem is

  1. Medullary parenchyma

  2. Vascular parenchyma

  3. Conjunctive parenchyma

  4. Armed parenchyma


Correct Option: A
Explanation:

Medullary parenchyma, is the parenchyma, which is found radially arranged in between the vascular bundles in the stem. It is meant for storage of reserve food.

Which of the following parenchyma, is sub devided into, xylem parenchyma and phloem parenchyma?

  1. Medullary parenchyma

  2. Conjunctive parenchyma

  3. Vascular parenchyma

  4. Armed parenchyma


Correct Option: C
Explanation:

Vascular parenchyma, is the parenchyma, which is found associated with the vascular tissues, xylem and phloem. Accordingly, it is distinguished into, xylem parenchyma and phloem parenchyma.

The aquatic floating plant contains

  1. Prosenchyma

  2. Vascular parenchyma

  3. Chlorenchyma

  4. Arenchyma


Correct Option: D
Explanation:

Arenchyma, is the parenchyma, in which the cells enclose large intercellular spaces, that are filled with air. Aerenchyma helps in buoyancy and respiration. It is characteristically found in aquatic floating plants.

The chloroplasts containing parenchyma is

  1. Prosenchyma

  2. Chlorenchyma

  3. Arenchyma

  4. Vascular parenchyma


Correct Option: B
Explanation:

Chlorenchyma, is the parenchyma, in which the cells contain large number of chloroplasts. Chlorenchyma takes part in photosynthesis. It occurs in the leaves, and other green parts of the plant body.

The bouyancy providing parenchyma is

  1. Chlorenchyma

  2. Prosenchyma

  3. Arenchyma

  4. Vascular parenchyma


Correct Option: C
Explanation:

Arenchyma, is the parenchyma, in which the cells enclose large intercellular spaces, that are filled with air. Aerenchyma helps in bouyancy and respiration. It is characteristically found in aquatic floating plants.

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