Tag: levels of organisation in plants

Questions Related to levels of organisation in plants

The stalk of a leaf is derived from which one of the following types of plant tissue?

biology plant tissues tissues of plants levels of organisation in plants structural organization in living organisms

  1. Sclerenchyma

  2. Paranchyma

  3. Chlorenchyma

  4. Collenchyma

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Correct Option: D

Which of the following tissue provides mechanical support to the growing parts of the plants such as young stem and petiole of a leaf ?

biology plant tissues tissues of plants levels of organisation in plants structural organization in living organisms

  1. Parechyma

  2. Sclerenchyma

  3. Collenchyma

  4. Chlorenchyma

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Correct Option: A
Identify the simple tissue from the following.
biology plant tissues tissues of plants levels of organisation in plants structural organization in living organisms

  1. Parenchyma

  2. Xylem

  3. Epidermis

  4. Phloem

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Correct Option: A
Explanation:

Simple permanent tissue: Made up of only one type of cells. Parenchyma, collenchyma, sclerenchyma.

Complex permanent tissues: Made up of many kinds of cells.Xylem and pholem.
Parenchyma: It is most simple and unspecialized tissue which is concerned mainly with the ordinary vegetative activities of the plant.
So, the correct answer is 'Parenchyma'.

Match the following and choose the correct option from below

A. Meristem (i) Photosynthesis, storage
B. Parenchyma (ii) Mechanical support
C. Collenchyma (iii) Actively dividing cells
D. Sclerenchyma (iv) Stomata
E. Epidermal tissue (v) Sclereids
biology plant tissues tissues of plants levels of organisation in plants structural organization in living organisms

  1. A-(i), B-(iii), C-(v), D-(ii), E-(iv)

  2. A-(iii), B-(i), C-(ii), D-(v), E-(iv)

  3. A-(ii), B-(iv), C-(v), D-(i), E-(iii)

  4. A-(v), B-(iv), C-(iii), D-(ii), E-(i)

Show answer
Correct Option: B
Explanation:

A. Meristem: It includes group or cluster of cells which remain in a continuous state of division or retain their power of division.

B. Parenchyma: It performs the function of storage of reserve food materials, storage of water in succulents, Buoyancy and gaseous exchange in water plants.
C. Collenchyma: It is the chief supporting tissue in young dicotyledonous stems. The tissue has the capacity to expand and gives tensile strength to the body.
D. Sclerenchyma: It consists of thick-walled dead cells. It is of two main types: Fibres and Sclereids. Sclereids are short and possess extremely thick lamellated lignified walls with long tubular simple pits.
E. Epidermal tissue:  The tissue originates from the outermost layer of the apical meristem. It has epidermis, cuticle and wax, Stomata, Trichomes. Singular of stomata is stoma. A typical stoma is microscopic and usually consists of two kidney-shaped guard cells surrounding a pore.
So, the correct answer is 'A-(iii), B-(i), C-(ii), D-(v), E-(iv)'.


Which of the following is a parasitic plant?

biology plant tissues tissues of plants levels of organisation in plants structural organization in living organisms

  1. Cactus

  2. Saliva

  3. Cuscuta

  4. Cucumber

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Correct Option: C
Explanation:

Cuscuta is a parasitic plant. It is lack chlorophyll hence it appears as yellow tubular structures and obtains its food from its host mirabel.

If the contents of a leaf tissue are a carefully fractioned, which of the  fraction could be called alive?

biology plant tissues tissues of plants levels of organisation in plants structural organization in living organisms

  1. Mitochondria

  2. ER

  3. Cell wall

  4. Ribosomes

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Correct Option: B
Explanation:

Mitochondria contains DNA. Thus. it is called semiautonomous organelle and it can survive the fractionation process.

Pectic material are stained with

biology structural organization in living organisms structure of a plant cell levels of organisation in plants plant and animal cell

  1. Cotton blue

  2. Acetocarmine

  3. Iodine

  4. Methylene blue

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Correct Option: D
Explanation:

Pectic substances are a group of polysaccharides in plant cell walls and some mucilages, which are endowed with multifunctional properties, such as the control of cell wall integrity and porosity. Methylene blue is used to indicate whether the cells are dead or alive.

 So, the correct answer is 'Methylene blue.'

The plant cells central vacuole

biology structural organization in living organisms structure of a plant cell levels of organisation in plants plant and animal cell

  1. Provides the plant cell with support

  2. Stores nutrients and cellular waste products

  3. Is a reservoir for water

  4. All of the above

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Correct Option: D
Explanation:
In plant cells, there is a centrally located large vacuole. This vacuole serves as the reservoir of water and sometimes wastes. It also provides the plant cell with structural support and also reserves nutrients.

So, the correct answer is 'all of the above'.

Plant cells need a protective cell wall around their cells because

biology structural organization in living organisms structure of a plant cell levels of organisation in plants plant and animal cell

  1. they are far more important than the animal cells

  2. they cannot move and protect themselves from the extreme weather conditions

  3. they are prokaryotic cells

  4. None of the above

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Correct Option: B
Explanation:

The Eukaryotic cells, in addition to the nucleus, have many membrane-bound organelles like the mitochondria, endoplasmic reticulum, Golgi bodies etc. Such membrane-bound organelles are absent in the Prokaryotic cells

Casparian Strips are found on the

biology structural organization in living organisms structure of a plant cell levels of organisation in plants plant and animal cell

  1. Walls of pericycle cells

  2. Walls of endodermal cells

  3. Walls of epidermal cells

  4. Walls of bundle sheath cells

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Correct Option: B
Explanation:
Endodermis is the innermost layer of the cortex. It is made up of barrel-shaped cells which do not enclose intercellular spaces. The young endodermal cells possess a ligno suberised  thickenings called casparian strip s or casparina bands which runs along their radial and tangential walls.
So the correct option is 'Walls of endodermal cells'.