The tissues present between the adaxial and abaxial epidermis are
1. | mesophyll |
2. | chlorophyll |
3. | vascular bundle |
4. | Both A and C |
Which of the following is true for palisade parenchyma?
1. | adaxially placed |
2. | elongated cells |
3. | vertically and parallely placed |
4. | All of the above |
Midrib and veins of the represent
1. | vascular bundle |
2. | cortex |
3. | palisade parenchyma |
4. | spongy parenchyma |
The size of the vascular bundles are dependent on the size of the
1. | veins | 2. | air cavities |
3. | chloroplast | 4. | All of the above |
Which one is true for dicot leaf
1. | veins thickness vary |
2. | reticulate venation is present |
3. | all vascular bundles are similar in size |
4. | Both 1 and 2 |
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 |
Sclerenchymatous fibres are
1. | thick walled, elongated and pointed cells |
2. | contains simple and bordered pits |
3. | smallest cells in plant body |
4. | All of these |
How many elements of the xylem are dead
1. four
2. three
3. two
4. one
Which one is true regarding xylem?
1. | vessels are absent in gymnosperms |
2. | cells of vessel are called vessel members |
3. | tracheid and vessel lack protoplasm |
4. | All of these |
The type of primary xylem when protoxylem lies towards the pith is known as
1. endarch
2. exarch
3. endoexarch
4. Both (1) and (3)