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.
The lower surface of the leaf will have more stomata in a
1. | dorsiventral leaf | 2. | isobilateral leaf |
3. | Both 1 and 2 | 4. | None of these |
Which of the following characters is/are related to isobilateral leaf?
(a) | Stomata are present on both surfaces. |
(b) | Mesophyll is differentiated into palisade and spongy parenchyma. |
(c) | Sub-stomatal cavity is present below the stoma of the abaxial epidermis. |
1. Only (a)
2. Only (c)
3. Only (a) and (c)
4. (a), (b) and (c)
1. | Protecting the plant from salt stress. |
2. | Increased photosynthesis in monocots. |
3. | Providing large spaces for storage of sugars. |
4. | Inward curling of leaves in monocots. |
Large, empty colourless cells of the adaxial epidermis along the veins of grass leaves are:
1. | Lenticels | 2. | Guard cells |
3. | Bundle sheath cells | 4. | Bulliform cells |
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
In monocot leaf
1. | Stomata is present on both surface of epidermis |
2. | Mesophyll is not differentiated into palisade and spongy parenchyma |
3. | There is no parenchyma |
4. | Both 1 and 2 |
The similar size of vascular bundle in monocot leaf is due to
1. | Reticulate venation |
2. | Parallel venation |
3. | Branched venation |
4. | Radial venation |
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