Bulliform cells:

1. Are found in dorsiventral leaves and help in photosynthesis.

2. Are found in dorsiventral leaves and help in minimizing water loss.

3. Are found in isobilatetral leaves and help in minimizing water loss.

4. Are found in isobilatetral leaves and help in photosynthesis.

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During secondary growth in the stem:-

1. The amount of secondary xylem produced is more than the secondary phloem as the
cambium is generally more active on the inner side than the outer.

2. the amount of secondary phloem produced is more than the secondary xylem as the cambium is generally more active on the inner side than the outer.

3. the amount of secondary xylem produced is more than the secondary phloem as the cambium is generally more active on the outer side than the inner.

4. the amount of secondary phloem produced is more than the secondary xylem as the cambium is generally more active on the outer side than the inner.

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In temperate region plants, the wood with fewer xylary elements and narrow vessels, is termed as:-

1. Spring wood
2. Autumn wood
3. Sap wood
4. Heart wood

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The endodermis is absent or indistinct in the:-
1. Roots of all plants
2. Leaves of pteridophytes
3. Leaves of gymnosperms
4. Stems of woody plants

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The term 'bark' includes : 

I.      Phellogen

II.     Phellem

III.    Phelloderm

IV.     Secondary phloem

 

1.       I, II and III only

2.       I, II and IV only

3.       II, III and IV only

4.       I, II, III and IV only

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Identify the incorrect statement:

1.  The presence of vessels is a characteristic of angiosperms

2.  In roots the primary xylem is exarch

3.  Gymnosperms lack albuminous cells and sieve cells

4.  Bast fibers are generally absent in primary phloem

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Parts of grasses removed by the grazing herbivores are regenerated due to the activity of: 

1. Apical meristem

2. Intercalary meristem

3. Interfascicular cambium

4. Fascicular vascular cambium

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In the dicot root, the vascular cambium:-
1. is absent
2. is completely secondary in origin
3. does not form a continuous ring
4. originates from the tissue just above the phloem bundles

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Lignin is a component of the secondary walls of:-

1. Epidermis

2. Collenchyma

3. Sclerenchyma

4. Parenchyma

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A plant requires potassium for:

(1) Holding its cells together

(2) Synthesizing chlorophyll

(3) DNA replication

(4) Opening and closing its stomata

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