1. | Epiblema | 2. | Cortex |
3. | Endodermis | 4. | Pericycle |
1. | Parenchyma | 2. | Collenchyma |
3. | Sclerenchyma | 4. | Sclereid |
I. | Gymnosperms lack vessels in their xylem. |
II. | In stems the arrangement of primary xylem is called an exarch. |
III. | Angiosperms lack sieve tubes and companion cells. |
IV. | Phloem fibres are generally absent in primary phloem. |
Assertion (A): | During secondary growth in a dicot stem, the amount of secondary phloem produced is more than the secondary xylem. |
Reason (R): | Cambium is generally more active on the inner side than on the outer. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is false but (R) is true. |
4. | Both (A) and (R) are false. |