SHORT QUESTION FOR TISSUE AND TISSUE SYSTEM

 Differentiate between simple and compound tissues.

Ans: The tissues with similar type of cells are called simple

tissues. Examples: parenchyma, collenchyma and sclerenchyma. The tissues Yvith different types of cells are called compound tissues.

What are parenchyma? Give their function.

Ans: The simple tissues with cells having thin and elastic walls are called parenchyma. Parenchyma forms the main ground tissues. They are continnons throughout the body. They are present in root. stem and leaves.

How do parenchyma play role in storage of food?

Ans: Parenchyma also store food in fruits and roots els: They arc called storage parenchyma. nese parenchymas have many leucoplasts in their cells. These parenchyma stores starch. fats, oils and other grantdcs. Storage parenchymas are common in the cortex of stem. root and seeds.

flow do parenchyma play role in storage of food?

Ans: at: parenchyma cells of succulent plants store \kilter. Thesecells are large itli thin cell . Differentiate between simple and compound tissues.

Differentiate between simple and compound tissues.

Ans: The tissues with similar type of cells are called simple tissues. Examples: parenchyma, collenchyma and sclerenchyma. The tissues Yvith different types of cells are called compound tissues.

What are parenchyma? Give their function.

Ans: The simple tissues with cells having thin and elastic walls are called parenchyma. Parenchyma forms the main ground tissues. They are continnons throughout the body. They are present in root. stem and leaves.

How do parenchyma play role in storage of food?

Ans: Parenchyma also store food in fruits and roots els: They arecalled storage parenchyma. nese paites have thin layer of
cytoplasm. These
cells have lame vacuoles. These vacuoles contain muciftijam.s sap. This sap increases the water holding o;yric:ily of the cell.

What are Coilenchyma? Give their function.

Ans:cells with uneven angular thickening witch suppott young miming pan of plant are called collenchynia. Coll:Lica) ma tissues torn: separate strands or continuous cylinder near the surface of the stem cortex, in petioles and along the vein of the leaves. Collenchyma tissues are absent in roots. Collenchyma tissues are also absent in stem and leaves of many monocot plants.

  1. What Lacunar collenchyma?

Ans: In these tissues thickenings are present in wall which faces

intercellular spaces. Lacunar collenchymas are present in the petiole of composite species.

  1. What are sclerenchyma? Give their function.

Ans The lignified tissues which lack protoplast at maturity are

called sclerenchyma. They have thick secondary wall. These are main strengthening tissues of plant. Sclerenchyma cells are found in all parts of plant. They are present in both ground tissues and vascular tissues.

What are commercial fibers?

Ans: Phloem or bast fibers have great economic importance. These fibers give coinmercial fiber. These fibers are used in rope and cloth making. Some important plants which give commercial fibers are: Hemp, Jute, Kenaf, Flax etc. Some commercial fibers are obtained from the leaf of monocot plants. These plants are: Manila hemp, Bowstring hemp, New Zealand hemp and pineapple fibers.

Differentiate between vessel members and tracheids.

Ans: The tracheary elements which are short, wide and With perforated end walls are called vessel members. The tracheary elements which are elongated tube like with tapering ends are called tracheids.

Differentiate between Fiber tracheids and Lib tracheids.

Ans: They are like ids. But they have very thick wa walls haver mnant of bordered pit. These narrower?remnant of simple pits in their

Differe *teen protoxylem and Metaxylem.


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Ans: The early irtnoary xylems are called proto Protwiylein appeats at the beginning of differentiatio xylems appear later during differentiation are a metaxylem.

Differentiate between primary and secondary xylemS.
Ans:
The xylems produced as a result of primary growth are called primary xylem. The xylems which are produced as a result of Secondary growth are called secondary xylem.

What are Sieve elements and companion cells?

Ans: The elongated cells with characteristic sieve areas in their walls are called sieve elements. The thin walled parenchyma cells closely associated with the sieve elements are called companion cells.

What are albuminous cells?

Ans: Certain parenchyma cells called albuminous cells are closely associated with sieve elements in these plants. These albuminous cells are similar to the companion cells in their function.

Differentiate between Protophloem and Metaphloem?

Ans: Protophloem is composed of elongated sieve elements only. Metaphloem mature later than protophloem. So they remain active for longer time. Secondary growth does not occur in monocot plants.

What are ectodesmata?

Ans: The outer walls of the epidermal cells become thick by the development of secondary wall. The outer walls have remnants of plasmodesmata called ectodesmata. Ectodesmata allow the passage of certain substances that are discharged through the cuticle.

What are Trichomes? Give their function.

Ans: Trichomes are different types of appendages. Trichomes are commonly present on the surface of epidermis. They are present in etelorm of hairs, papillae and water absorbing roots. Tricborakpccur in all parts of the plant. Trichomes are often omic character.

What are subsidry cells?

Ans: In cell have one or more subsidiary cells. Eric nt has characteristic number of subsidiary iarv cells are distinct from other epidermal cells.

What are and Anisocytic stomata:

Ans: In case of moeytic stoamta. the guard cells are surrounded by certain number of cells. These cells have similar shapes. Example: buttercup. In case of Anisocytic stomata, the guard cells are surrounded by three subsidiary cells. These cells have different sizes. Example: potato.

What are Paracytic and Diactyic stomata:

Ans: Paracytic stomata, each guard cell is surrounded by one or more cells. The longitudinal axis of these cells is parallel to the guard cells and apertures. Example: onion. In case of Diactyie stomata each guard is surrounded by two subsidiary cells. The common all of these cells is at right angles to the longitudinal axis.

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