The similar size of vascular bundle in monocot leaf is due to

In monocot leaf

Match the following

 A. A-iii, B-iv, C-i, D-ii

B. A-i, B-ii, C-iii, D-iv

C. A-iii, B-ii, C-iv, D-i

D. A-iii, B-ii, C-i, D-iv

The desert grasses, often curls their leaf to minimise water loss due to presence of 

1. Spines

2. Palisade parenchyma

3. Bundle sheath cells

4. Bulliform cells

The stomata are equally distributed on both the surfaces of the epidermis in

1. Dorsiventral leaf

2. Dicot stem

3. Isobilateral leaf

4. Dicot root

Which is the correct set of options with respect to the following?
1. Dicot stem         –  Differentiated ground tissue.
    Monocot stem    –  Endarch xylem.
    Dicot leaf           –  Isobilateral leaf.
    Monocot leaf      –  Dorsiventral leaf.

2. Dicot stem         –   Scattered vascular bundle.
    Monocot stem    –   Arranged vascular bundle.
    Dicot leaf           –   Amphistomatic.
    Monocot leaf      –   Hypostomatic.

3. Dicot stem          –   Endodermis is called a starch sheath.
     Monocot stem    –  Vascular bundle surrounded by a sclerenchymatous sheath.
      Dicot leaf          –  Palisade and spongy parenchyma.
      Monocot leaf     –  Stomata present on both surfaces.

4.  Dicot stem         –  Arranged vascular bundle.
    Monocot stem      – Endodermis is called a starch sheath.
    Dicot leaf            –  Amphistomatatic.
    Monocot leaf       –  Palisade and spongy
                                 parenchyma.

In grasses leaves are exposed when bulliform cells becomes­­­­_________ and leaves curl inwards when they are _________

(1)flaccid ,turgid

(2)plasmolysed, turgid

(3)turgid, flaccid

(4)Both B and A

The no of stomata are _______on upper and ______lower surface in monocot leaf
1.more, less
2.less, more
3.equal, equal
4.None of the above

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.

Grass leaves curl inwards during very dry weather. Select the most appropriate reason from the following :

1. Tyloses in vessels

2. Closure of stomata 

3. Flaccidity of bulliform cells

4. Shrinkage of air spaces in spongy mesophyll