Tuesday, March 13, 2012

TISSUES ASSIGNMENT

1 Choose the correct statement




Ans:Meristems do not have intercellular spaces
2 The term meristem is given by a person who also coined the terms




Ans:Xylem and Phloem
3 Most of the cells of this meristem are not isodiametric




Ans:Vascular cambium
4 Choose the correct statements
I. A tissue can posses morphologically similar cells
II. Some tissues have both living and dead cells
III. A tissue always has differentiated cells
IV. Cells of meristems are in one or other stages of cell cycle





Ans:I, II, IV
5 [A]: Meristematic cells have more mitochondria
[R]: Lysosomes are abundantly seen in dividing cells





Ans:Both A and R are true but R is not the correct explanation of A
6 [A]: Meristematic cells do not have Tanins
[R]: Ergastic substances are absent in Meristematic cells





Ans:A is true but R is false
7 In cell wall composition and nature of thickness, Meristems show more similarities with




Ans:Parenchyma
8 These are coenocytes




Ans:Latex cells
9 Laticifers are mostly associated with




Ans:Phloem
10 These secretary tissues impart fragrance to the various plant parts.




Ans:Osmophores
11 Modified leaves have nectaries in
I. Nepenthes
II. Passiflroa
III. Euphorbia
IV. Citrus





Ans:I, III
12 These secretary tissues are in the form of Flaps.




Ans:Osmophores
13 Para rubber is obtained from




Ans:Hevea
14 Guard cells form a part of the following secretary tissue




Ans:Hydathode
15 Latex is stored in




Ans: Organelle with tonoplast
16 [A] :Tropaeolum shows Guttation
[R] : It has a type of tissues having epithem





Ans:Both A and R are correct and R explains A
17 Study the following and identify the correct match
A. Enzymes I.  Hydathode
B. Rubber II. Nectaries
C. Water III.Essential oils
D. Sugars IV.Latex
                V. Digestive glands





Ans:A - V, B- IV, C- I, D - II
18 Identify the internal structures among the given secretary tissues
I. Special issues seen in the leaves of Citrus
II. special tissues seen in the stems of Hevea
III. Special tissues associated with the leaves of Pitcher plant
IV. Special tissues associated with the leaves of Tropaeolum





Ans:I and II
19 Presence of big cavities is a feature of following secretary tissue




Ans:Hydathodes
20 Study the following and choose the correct match





Ans:A - II, B - III, C - IV, D - I
21 The following are ontogenetically more related




Ans:Sieve tube member, Companion cell
22 Choose the correct statement




Ans:A sieve tube element is associated with one or more than one companion cells
23 Study the following table and choose the correct combination





Ans:A and B
24 [A]: Sieve cells are living at maturity
[R]: They have nucleated cytoplasm





Ans:A is true but R is false
25 The life of sieve element is supported by




Ans:Companion cells
26 [A]: Sieve areas are unspecialized in sieve elements of Gymnosperms
[R]: Sieve elements of fruitless spermatophytes lack sieve plates





Ans:Both A and R are true and R is the correct explanation of A
27 Ray phloem parenchyma is commonly seen in
I. Dicots
II. Monocots
III. Gymnosperms
IV. Pteridophytes





Ans:I and III
28 [A]: Xylem is a complex tissue
[R]: It has collocytes, parenchyma cells and Fibres





Ans:A is true but R is false
29 Radial system of xylem has
I. Tracheids
II. Vessels
III. Axial parenchyma
IV. Ray parenchyma
V. Libriform fibres
VI. Fibre tracheids





Ans:Only IV
30 Study the following table and choose the correct combination





Ans:I and III
31 [A]: Tracheary elements with pitted thickenings are more rigid
[R]: Their cell walls are heavily lignified





Ans:Both A and R are true and R is the correct explanation of A
32 Arrange the following vessel elements that depicts the gradual increase in their plasticity.
I. Vessel member with reticulate thickenings
II. vessel element with Annular thickenings
III. Vessel element with Scalariform thickenings
IV. Vessel element with Helical thickenings





Ans:III, I, II, IV
33 [A]: Vessels of stem are more narrower than the vessels of Root of the plant
[R]: High auxin concentration quickens the differentiation of vessel elements.





Ans:Both A and R are true and R is the correct explanation of A
34 [A]: Parenchyma is fundamental tissue
[R]: All other tissues are embedded in Parenchyma





Ans: Both A and R are true but R is not the correct explanation of A
35 Lamellar collenchyma is seen in




Ans:Sambucus
36 Unbranched sclereids are
I. Brachysclereids
II. Macrosclereids
III. Filiform sclereids
IV. Trichosclereids





Ans:I, II, III
37 This fibre lacks Lignin




Ans:Flax

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