I: | Gymnosperms have albuminous cells and sieve cells but lack sieve tubes and companion cells |
II: | The sieve tube elements and companion cells are connected by pit fields present between their common longitudinal walls. |
III: | Cell walls of phloem parenchyma cells have pits through which plasmodesmatal connections exist between cells. |
IV: | Phloem parenchyma is absent in most of the monocots. |
V: | Phloem fibers become dead at maturity. |
VI: | Phloem fibers are generally absent in primary phloem. |
A | B | C | D | |
1. | Sieve pore | Sieve tube element | Phloem Parenchyma | Companion cell |
2. | Sieve tube element | Sieve pore | Phloem Parenchyma | Companion cell |
3. | Sieve pore | Sieve tube element | Companion cell | Phloem Parenchyma |
4. | Sieve tube element | Sieve pore | Companion cell | Phloem Parenchyma |
A | B | |
1. | Xylem | Phloem |
2. | Phloem | Xylem |
3. | Vessel | Tracheid |
4. | Tracheid | Vessel |
Statement I: | Sclereids are highly thickened dead cells with very narrow cavities. |
Statement II: | Sclereids are commonly found in fruit walls of nuts, seed coat of legumes and leaves of tea. |
I: | Monocots have companion cells, dicots do not. |
II: | Monocots have sieve tubes, while dicots have sieve cells. |
Column I [Plant part] |
Column II [Type of vascular bundle] |
||
A | Monocot root | P | Radial, two to four patches |
B | Dicot root | Q | Radial, polyarch |
C | Monocot stem | R | Conjoint, open, ring arrangement |
D | Dicot stem | S | Conjoint, Closed and scattered |
A | B | C | D | |
1. | P | Q | R | S |
2. | Q | P | R | S |
3. | Q | P | S | R |
4. | P | Q | S | R |
1. | Absorb water from the soil. |
2. | Exchange gases with the environment, primarily for photosynthesis and respiration. |
3. | Transport nutrients from the roots to other parts of the plant. |
4. | Protect against herbivores by secreting defensive compounds |
I: | Sclerenchyma cells are typically dead and have thickened lignified walls that help in providing structural support. |
II: | Xylem tissues are primarily involved in the storage of proteins and starch. |
III: | Phloem tissues are responsible for the transport of water and minerals from the roots to the leaves. |
IV: | Parenchyma cells are versatile cells that can store food, and are also involved in photosynthesis and repair. |
Assertion (A): | The presence of a casparian strip is characteristic of the endodermis in plant roots. |
Reason (R): | The casparian strip is made up of cellulose and pectin which helps in regulating the flow of substances into the vascular tissue. |
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 True but (R) is False. |
4. | (A) is False but (R) is True. |
Statement I: | Parenchyma cells are loosely packed and have large intercellular spaces. |
Statement II: | Collenchyma cells are thin-walled and primarily serve to transport nutrients. |
1. | Only Statement I is correct. |
2. | Only Statement II is correct. |
3. | Both Statement I and Statement II are correct. |
4. | Both Statement I and Statement II are incorrect |