Question Bank No: 2

1. Bundle sheath is absent around vascular bundles of

 a)Dicot stem
 b)Monocot stem
 c)Dicot leaf
 d)Monocot leaf

2. A monocot showing secondary growth is

 a)Coconut
 b)Sugarcane
 c)Maize
 d)Yucca

3. Vascular bundle with protoxylem towards the periphery is

 a)Radial
 b)Endarch
 c)Exarch
 d)Closed

4. Vessels of heart wood are blocked by

 a)Hydathodes
 b)Tyloses
 c)Stomata
 d)Latex

5. Common features between lenticels and hydathodes are

 a)Allow exchange of gases
 b)Always remain closed
 c)There is no regulation of their opening and closing
 d)They occur on the same organ of the plant

6. Periderm is produced by

 a)Vascular cambium
 b)Fascicular cambium
 c)Phellogen
 d)Intrafascicular cambium

7. Velamen takes part in

 a)Respiration
 b)Absorption of moisture
 c)Transpiration
 d)Protection

8. Annual rings are bands of

 a)Secondary xylem and vascular rays
 b)Secondary phloem and vascular rays
 c)Secondary vascular tissues
 d)Cork and secondary cortex

9. In stem xylem is

 a)Polyarch
 b)Exarch
 c)Endarch
 d)Mesarch

10. Secondary growth in dicots and gymnosperms occurs by

 a)Formation of vascular rays
 b)Thickening of tracheary elements
 c)Formation of meristematic cells in vascular region
 d)Development of meristamatic cells in vascular and cortical regions

11. Safranin stains

 a)Lingnified elements
 b)Suberised elements
 c)Pectinised walls
 d)Cellulose cell walls

12. In roots, lateral branches grow from

 a)Epiblema
 b)Pericycle
 c)Cortex
 d)Endodermis

13. In dicot stem the vascular bundles are

 a)Concentric and open
 b)Concentric and closed
 c)Conjoint, collateral and closed
 d)Conjoint, collateral and open

14. Interfascicular cambium is

 a)One cell thick
 b)Two cells thick
 c)Several cells thick
 d)Variable in thickness

15. In leaves, protoxylem (xylem) elements

 a)Face towards the adaxial side
 b)Face towards the abaxial surface
 c)Are surrounded by metaxylem
 d)Are scattered in the middle

16. What are the parts of periderm?

 a)Periblem, phellogen, phelloderm
 b)Periblem, phellogen, plerome
 c)Phellem, phellogen, phelloderm
 d)Cortex, dermatogen, phelloderm