What are fibres and sclereids?

What are fibres and sclereids?
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1 Answer

Answer :

Sclerenchyma cells consisting of elongated, thread like thick walled cells are called fibres.

Sclerenchyma cells consisting of hard cells found in group and having more lignin are

called sclereids. The cells of sclereids are isodiametric or columnar or bone shaped or

star shaped
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Related questions

Which of the following is not true about ‘sclereids’? (a) These are groups of living cells. (b) These are found in nut shells, guava pulp, pear. (c) These are also called stone cells. (d) These are form of sclerenchyma with fibres.

Description : Which of the following is not true about ‘sclereids’? (a) These are groups of living cells. (b) These are found in nut shells, guava pulp, pear. (c) These are also called stone cells. (d) These are form of sclerenchyma with fibres.

Last Answer : (a) These are groups of living cells

Which of the following is not true about ‘sclereids’? (a) These are groups of living cells. (b) These are found in nut shells, guava pulp, pear. (c) These are also called stone cells. (d) These are form of sclerenchyma with fibres.

Description : Which of the following is not true about ‘sclereids’? (a) These are groups of living cells. (b) These are found in nut shells, guava pulp, pear. (c) These are also called stone cells. (d) These are form of sclerenchyma with fibres.

Last Answer : (a) These are groups of living cells.

Where are sclereids found?

Description : Where are sclereids found?

Last Answer : Sclereids are found in fruit wall and seed coat.

Why sclereids are commonly called stone cells?

Description : Why sclereids are commonly called stone cells?

Last Answer : Sclereids are hard cells found in groups and have more lignin, hence they are commonly called stone cells.

Types of sclereids. -Biology

Description : Types of sclereids. -Biology

Last Answer : answer:

Where are sclereids found? -Biology

Description : Where are sclereids found? -Biology

Last Answer : Sclereids are a reduced form of sclerenchyma cells with highly thickened, lignified cellular walls that form small bundles of durable layers of tissue in most plants.Sclereids are typically found in ... tissue, and vascular tissue. The term "sclereid" was introduced by Alexander Tschirch in 1885.

What is the function of sclereids? -Biology

Description : What is the function of sclereids? -Biology

Last Answer : Sclereids are a reduced form of sclerenchyma cells with highly thickened, lignified cellular walls that form small bundles of durable layers of tissue in most plants.Sclereids are typically found in ... tissue, and vascular tissue. The term "sclereid" was introduced by Alexander Tschirch in 1885.

Explain various kinds of sclereids with examples

Description : Explain various kinds of sclereids with examples

Last Answer : Ans: Sclereids are relatively short sclerenchyma cells which occur either singly or in groups in various parts of the plant body. They are of the following types. 1. Brachysclereids: These are ... that are extended into even intercellular spaces. Ex: Leaves of Olea and aerial roots of Monstera

Why can cardiac muscle fibres contract for longer periods than skeletal fibres? (a) Cardiac muscle is self-excitatory (b) Extracellular calcium partially controls the strength (and length) of contraction (c) Cisternae of T-tubules are more developed in cardiac muscle (d) Cardiac muscle is uninucleate rather than multinucleate

Description : Why can cardiac muscle fibres contract for longer periods than skeletal fibres? (a) Cardiac muscle is self-excitatory (b) Extracellular calcium partially controls the strength (and length) ... tubules are more developed in cardiac muscle (d) Cardiac muscle is uninucleate rather than multinucleate

Last Answer : Ans:(a)

Our major foods, fibres, spices, fruits and beverage crops are (a) Flowering plants (b) Gymnospermous plants (c) Pteridophytes (d) Bryophytes

Description : Our major foods, fibres, spices, fruits and beverage crops are (a) Flowering plants (b) Gymnospermous plants (c) Pteridophytes (d) Bryophytes

Last Answer : Ans:(a)

Which fiber is chemcially identical to cotton fibres?

Description : Which fiber is chemcially identical to cotton fibres?

Last Answer : Rayon

Our major foods; fibres; spices; fruits and beverage crops are?

Description : Our major foods; fibres; spices; fruits and beverage crops are?

Last Answer : flowering plants

Identify the two components of Phloem tissue that help in transportation of food in plants (a) Phloem parenchyma & sieve tubes (b) Sieve tubes & companion cell. (c) Phloem parenchyma & companion cell. (d) Phloem fibres and sieve tubes

Description : Identify the two components of Phloem tissue that help in transportation of food in plants (a) Phloem parenchyma & sieve tubes (b) Sieve tubes & companion cell. (c) Phloem parenchyma & companion cell. (d) Phloem fibres and sieve tubes

Last Answer : (b) Sieve tubes & companion cell.

The process of chipping wood and making into fibres is called

Description : The process of chipping wood and making into fibres is called

Last Answer : pulping.

Messages in optic fibres reach faster.

Description : Messages in optic fibres reach faster.

Last Answer : As photons travel much faster than electrons.

Give reasons: a) Optic fibres do not corrode.

Description : Give reasons: a) Optic fibres do not corrode.

Last Answer : As optic fibres do not react with air or water

What are the merits / advantages of optical fibres?

Description : What are the merits / advantages of optical fibres?

Last Answer : a) Optic fibres do not interact with air or water, so it does not corrode. b) Messages reach the destination much faster as photons transmit much faster than electrons. c) Optic fibres can transmit

Why are optical fibres used in telecommunication and networking?

Description : Why are optical fibres used in telecommunication and networking?

Last Answer : Optical fibres are flexible and can be bundled as cables hence it is used in telecommunication and networking.

Mention the uses of optical fibres.

Description : Mention the uses of optical fibres.

Last Answer : Optical fibres are used as a medium for telecommunication and networking.

The tissues in which the fibres in the matrix are loosely arranged is called loose

Description : The tissues in which the fibres in the matrix are loosely arranged is called loose

Last Answer : connective tissue.

Give reason: White and yellow fibres in cartilage are not easily visible.

Description : Give reason: White and yellow fibres in cartilage are not easily visible.

Last Answer : The refractive index of the fibres and the matrix are same. Hence they are not easily visible

Name the three types of fibres found in the areolar tissue.

Description : Name the three types of fibres found in the areolar tissue.

Last Answer : a) White fibres or collagen fibres found in groups. b) Yellow fibres or elastic fibres found singly. c) Reticular fibres, forming a network.

State the function of muscle fibres.

Description : State the function of muscle fibres.

Last Answer : Muscle fibres or myofibres are specialized cells capable of contraction and relaxation that is responsible for movement of limbs, bending of the body, movement of internal organs like heart, stomach and alimentary canal.

State the function of a) sieve tubes b) sieve plate c) companion cells d) phloem fibres.

Description : State the function of a) sieve tubes b) sieve plate c) companion cells d) phloem fibres.

Last Answer : a) Sieve tubes: They play an important role in the conduction of food. b) Sieve plate: It allows the food to pass through the pores. c) Companion cells: They control the passage of food through the phloem. d) Phloem fibres: They provide tensile strength to the plant body.

Why are fibres used in making gunny bags and ropes?

Description : Why are fibres used in making gunny bags and ropes?

Last Answer : Sclerenchyma fibres are flexible and elastic; hence they are used in coir industries to make gunny bags and ropes.

What are optical fibres? Give three applications of these fibres.

Description : What are optical fibres? Give three applications of these fibres.

Last Answer : Ans. Optical fibres are tubes of glass which transmit light without significant absorption of light energy. T.I.R is the phenomenon used for this purpose. It is used for (i) Communication, (ii) Bio-medical engineering and (iii) Medical applications without operating the patient.

Name two textile industries using any animal fibres. Name an important State where these industries are located. -Geography

Description : Name two textile industries using any animal fibres. Name an important State where these industries are located. -Geography

Last Answer : Two textiles industries are : 1. Woollen Industry State—Punjab. 2. Silk Industry State—Karnataka.

Name two textile industries using animal fibres. -SST 10th

Description : Name two textile industries using animal fibres. -SST 10th

Last Answer : Animal fibres Important Centres Silk industry Kashmir; Karnataka—Bangalore and Mysore. Woollen industry Punjab and Haryana—Dhariwal, Amritsar, Ludhiana; Uttar Pradesh— Kanpur; Madhya Pradesh—Gwalior.

Name the process by which silk and wool fibres are made into fabric. -Science-7

Description : Name the process by which silk and wool fibres are made into fabric. -Science-7

Last Answer : Wool and Silk are made into fabric by the process of weaving.

Optical fibres are made up of thin strands of (a) copper material (b) silver material (c) glass like material -Technology

Description : Optical fibres are made up of thin strands of (a) copper material (b) silver material (c) glass like material -Technology

Last Answer : (c) Optical fibres are made up of thin strands of glass like material.

What are Purkinje fibers? What is the function of the Purkinje fibres? -Biology

Description : What are Purkinje fibers? What is the function of the Purkinje fibres? -Biology

Last Answer : answer:

What are spindle fibres? -Biology

Description : What are spindle fibres? -Biology

Last Answer : Spindle fibers form a protein structure that divides the genetic material in a cell. The spindle is necessary to equally divide the chromosomes in a parental cell into two daughter cells during ... division: mitosis and meiosis. During mitosis, the spindle fibers are called the mitotic spindle.

What is the function of the spindle fibres? -Biology

Description : What is the function of the spindle fibres? -Biology

Last Answer : Spindle fibers form a protein structure that divides the genetic material in a cell. The spindle is necessary to equally divide the chromosomes in a parental cell into two daughter cells during ... division: mitosis and meiosis. During mitosis, the spindle fibers are called the mitotic spindle.

What organelles produce spindle fibres? -Biology

Description : What organelles produce spindle fibres? -Biology

Last Answer : Centrioles produce spindle fibers in animal cells. These spindle fibers are active during mitosis when the DNA has replicated and the chromosomes are pulled apart during anaphase. Plants cells do not have centrioles but they still undergo mitosis.

Centrioles are present only in animals. In such a case how the spindle fibres are held in the cell division of plants? -Biology

Description : Centrioles are present only in animals. In such a case how the spindle fibres are held in the cell division of plants? -Biology

Last Answer : answer:

What is the function of xylem fibres. -Biology

Description : What is the function of xylem fibres. -Biology

Last Answer : The xylem is the vascular tissue responsible for the upward conduction of water and nutrients from the roots. The xylem tissue moves water and nutrients to various parts of the plant such as shoots and leaves. Its major components include xylem parenchyma, xylem fibers, tracheids, and xylem vessels

Phloem fibres function? -Biology

Description : Phloem fibres function? -Biology

Last Answer : Bast fibre (also called phloem fibre or skin fibre) is plant fibre collected from the phloem (the "inner bark", sometimes called "skin") or bast surrounding the stem of certain dicotyledonous plants. They support the conductive cells of the phloem and provide strength to the stem.

Optic fibres are mainly used for which purpose? -Do You Know?

Description : Optic fibres are mainly used for which purpose? -Do You Know?

Last Answer : answer:

Purkinje fibres mainly help in contraction of `:-`

Description : Purkinje fibres mainly help in contraction of `:-`

Last Answer : Purkinje fibres mainly help in contraction of `:-` A. Right auricle B. Left ventricle C. Ventricles D. Aorta

Purkinje fibres are found in `:-`

Description : Purkinje fibres are found in `:-`

Last Answer : Purkinje fibres are found in `:-` A. Brain B. liver C. eyes D. Heart

Longest fibres are found in

Description : Longest fibres are found in

Last Answer : Longest fibres are found in A. Jute B. Cotton C. Sun Hemp D. Coir

Bundles of striated muscle fibres called fasciculi are surrounded by a sheath called :-

Description : Bundles of striated muscle fibres called fasciculi are surrounded by a sheath called :-

Last Answer : Bundles of striated muscle fibres called fasciculi are surrounded by a sheath called :- A. Epimysium B. Perimysium C. Exomysium D. Endomysium

The surface of nerve fibres bear narrow areas called

Description : The surface of nerve fibres bear narrow areas called

Last Answer : The surface of nerve fibres bear narrow areas called A. Schwann cells B. Schwann nodes C. Nissl granules D. Nodes of Ranivier

Myelinated and unmyelinated nerve fibres are found in PNS respectively are

Description : Myelinated and unmyelinated nerve fibres are found in PNS respectively are

Last Answer : Myelinated and unmyelinated nerve fibres are found in PNS respectively are

Cells which envelop nerve fibres and form myelin sheath around the axon are

Description : Cells which envelop nerve fibres and form myelin sheath around the axon are

Last Answer : Cells which envelop nerve fibres and form myelin sheath around the axon are

Myelinated and unmyelinated nerve fibres are found in PNS respectively are

Description : Myelinated and unmyelinated nerve fibres are found in PNS respectively are

Last Answer : Myelinated and unmyelinated nerve fibres are found in PNS respectively are

Cells which envelop nerve fibres and form myelin sheath around the axon are

Description : Cells which envelop nerve fibres and form myelin sheath around the axon are

Last Answer : Cells which envelop nerve fibres and form myelin sheath around the axon are

Collagen fibres are secreted by

Description : Collagen fibres are secreted by

Last Answer : Collagen fibres are secreted by A. Mast cells B. Macrophage C. Histiocytes D. Fibroblasts

Yellow fibres are present in

Description : Yellow fibres are present in

Last Answer : Yellow fibres are present in A. Arrange in bundles B. Singly and branched C. Singly and undranched D. Unbranched & arrange in bundles

Assertion :- Each chromatid is attached with two spindle fibres during S-phase :- Reason :- During Anaphse-I each chromosome is found in bivalent form

Description : Assertion :- Each chromatid is attached with two spindle fibres during S-phase :- Reason :- During Anaphse-I each chromosome is found in bivalent form

Last Answer : Assertion :- Each chromatid is attached with two spindle fibres during S-phase :- Reason :- During ... . D. If both Assertion & Reason are false.