Match the plants in Column I with the description of anatomy of vascular bundles in them in Column II and select the correct option from the codes given:
Column I |
Column II |
A. Dicot stem |
a. Collateral, closed and scattered in ground tissue |
B. Monocot stem |
b. Conjoint, collateral endarch and open |
C. Dicot root |
c. Radial, exarch and polyarch [usually more than 6] |
D. Monocot root |
d. Radial, exarch and 2 to 6 in number |
Codes
A | B | C | D | |
1. | a | b | c | d |
2. | b | a | d | c |
3. | a | b | d | c |
4. | b | a | c | d |
Identify the correctly matched pairs:
I: |
Sieve cell |
Food conducting element in gymnosperms |
II: |
Sieve-tube element |
Food conducting element in angiosperms |
III: |
Albuminous cells |
Delivery of substances to sieve-tube element |
IV: |
Companion cell |
Delivery of substances to sieve cells |
1. Only I and II
2. Only III and IV
3. Only I and III
4. Only II and IV
Which of the following statements are correct?
I. Most gymnosperms lack vessels in their xylem
II. Most gymnosperms lack sieve cells and albuminous cells
III. Most monocotyledonous plants lack phloem parenchyma
1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III
In the transverse section of a young dicot stem, the term ‘hard bast’ will be used for the structure labeled:
1. | A | 2. | B |
3. | C | 4. | D |
In the given diagram showing the anatomy of a tree trunk, what are A, B, C and D respectively?
1. Secondary xylem, Secondary phloem, Periderm, Bark
2. Secondary phloem, Secondary xylem, Periderm, Bark
3. Secondary xylem, Secondary phloem, Phellem, Periderm
4. Secondary phloem, Secondary xylem, Phellem, Periderm
The following diagram shows the anatomy of the root of an epiphytic orchid. The function of the structure marked X is:
1. Photosynthesis
2. Storage
3. Protective
4. Repair and healing
In the given diagram:
1. the lighter outer area is the heart wood or alburnum and is mechanically strong, resistant to decay, and less easily penetrated by wood-preservative chemicals
2. the lighter outer area is the Sapwood or alburnum and is involved in transport of water and minerals to the crown of the tree
3. the darker inner area is the heart wood or duramen and is involved in transport of water and minerals to the crown of the tree
4. the darker inner area is the sap wood or duramen and is mechanically strong, resistant to decay, and less easily penetrated by wood-preservative chemicals
Identify the option where the difference between the anantomy of Dicot and Monocot root is not correctly mentioned:
Dicot root |
Monocot root |
||
1. |
Xylem bundles |
Numerous |
Vary between 2 and 6 |
2. |
Pith |
Small/absent |
Large/well developed |
3. |
Pericycle |
Gives rise to lateral roots, cambium and cork cambium |
Gives rise to lateral roots only |
4. |
Cambium |
Appears later as a secondary meristem |
Altogether absent |
Identify the option where the difference between the vascular bundles of Dicot and Monocot stem is not correctly mentioned:
|
Dicot stem |
Monocot stem |
1. |
Collateral and open |
Collateral and closed |
2. |
Arranged in a ring |
Scattered |
3. |
Larger toward the center |
Of uniform size |
4. |
Phloem parenchyma present |
Phloem parenchyma absent |
In the transverse section of a monocot root given below, identify A, B, C and D:
A | B | C | D | |
1. | Epidermis | Exodermis | Endodermis | Pericycle |
2. | Exodermis | Epidermis | Endodermis | Pericycle |
3. | Epidermis | Exodermis | Pericyle | Endodermis |
4. | Exodermis | Epidermis | Pericyle | Endodermis |