Compared to a dicot root, a monocot root has:
1. Many xylem bundles
2. Inconspicuous annual rings
3. Relatively thicker periderm
4. More abundant secondary xylem
Given below is the diagram of a stomatal apparatus. In which of the following, all the four parts labelled as A, B, C and D are correctly identified:
A | B | C | D | |
1. | Guard cell | Stomatal aperture | Subsidiary Cell | Epidermal Cell |
2. | Epidermal Cell | Guard Cell | Stomatal aperture | Subsidiary cell |
3. | Epidermal Cell | Subsidiary Cell | Stomatal aperture | Guard Cell |
4. | Subsidiary Cell | Epidermal Cell | Guard Cell | Stomatal aperture |
Some vascular bundles are described as open because these:
1. | are not surrounded by pericycle |
2. | are surrounded by pericycle but no endodermis |
3. | are capable of producing secondary xylem and phloem |
4. | possess conjunctive tissue between xylem and phloem |
The periderm includes:
1. Secondary phloem
2. Cork
3. Cambium
4. All of these
Identify the incorrectly matched pair:
1. | Dicot root | Parenchymatous conjunctive tissue between xylem and phloem |
2. | Monocot root | Polyarch xylem bundles and well-developed pith |
3. | Isobilateral leaf | Palisade and spongy parenchyma in mesophyll |
4. | Dorsiventral leaf | Bulliform cells are absent |
A vessel less piece of stem possessing prominent sieve tubes would belong to
1. Pines
2. Eucalyptus
3. Grass
4. Trachodendron
When we peel the skin of a potato tuber, we remove
1. Periderm
2. Epidermis
3. Cuticle
4. Sapwood
Fibres are likely to be absent in
1. Secondary phloem
2. Secondary Xylem
3. Primary phloem
4. Leaves
In which of the following pairs of parts of a flowering plant is epidermis absent?
1. Root tip and shoot tip
2. Shoot bud and floral bud
3. Ovule and seed
4. Petiole and pedicel
Phellogen and Phellem respectively denote
1. Cork and cork cambium
2. Cork cambium and cork
3. Secondary cortex and cork
4. Cork and secondary cortex