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Standard XII
Biology
Question

Bundle sheath extensions in a dicot leaf and in a monocot leaf are-and-respectively.
  1. Parenchymatous, collenchymatous
  2. Parenchymatous, sclerenchymatous
  3. Sclerenchymatous, parenchymatous
  4. Collenchymatous, sclerenchymatous

A
Parenchymatous, collenchymatous
B
Sclerenchymatous, parenchymatous
C
Collenchymatous, sclerenchymatous
D
Parenchymatous, sclerenchymatous
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Q1
Bundle sheath extensions in a dicot leaf and in a monocot leaf are ________ and ________ respectively.

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Q2
Consider the following statements.
a. Epidermis and cortex of monocot root are similar to those of dicot root.
b. Hypodermis of dicot stem consists of sclerenchymatous cells.
c. The cells of bundle sheath in maize leaf serve as temporary storage cells.
d. The dicot leaf is hypostomatic.
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Q3
Which one is false about monocot stem?
I. Vascular bundles is scattered, cojoint, close, surrounded by sclerenchymatous bundle sheath and cavity.
II. Hypodermis is scelerenchymatous.
III. Peripheral vascular bundles is smaller than centrally placed ones.
IV. Ground tissue is differentiated into cortex, pericycle, pith, etc.
V. Homogeneous parenchymatous ground.
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Q4
Vascular bundles in a dicot leaf are
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Q5
Identify the correct pair of statements.
(i) Pericycle parenchymatous in dicot root but sclerenchymatous in mature monocot root
(ii) Pericycle of both dicot and monocot root produces lateral roots during secondary growth
(iii) All cells of dicot root endodermis are passage cells
(iv) Xylem is produced in centripetal manner in roots of fruit bearing plants.
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