Select incorrect statements from the given below:
(i) | Endodermis with Casparian strips are found in the dicot stem. |
(ii) | The endodermis is a part of the stele. |
(iii) | Open vascular bundles are found in some monocots. |
(iv) | Bulliform cells are found in the upper epidermis in the isobilateral leaf. |
1 (i) and (ii)
2. (ii) and (iii)
3. (i), (ii) and (iii)
4. Only (iv)
Assertion (A) : Phellogen is a secondary meristem that forms cork on the outer side and secondary cortex on the inner side.
Reason (R) : Phellogen is formed every year from hypodermis and pericycle in dicot root and dicot stem respectively.
1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion.
2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion.
3. If Assertion is a true statement but the reason is false.
4. If both Assertion and Reason are false statements.
A: Secondary growth is absent in monocots
R: Monocots lack vascular cambium.
1. If both Assertion & Reason are true and the reason is the correct explanation of the assertion.
2. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion.
3. If Assertion is a true statement but the reason is false.
4. If both Assertion and Reason are false statements.
3. Match the following columns.
Column I |
Column II |
A. Cuticle B. Bulliform cells C. Stomata D. Epidermis |
1. Guard cells 2. Single layer 3. Waxylayer 4. Empty colourless cell |
Codes
Options: | A | B | C | D |
1. | 3 | 4 | 1 | 2 |
2. | 1 | 2 | 3 | 4 |
3. | 3 | 2 | 4 | 1 |
4. | 3 | 2 | 1 | 4 |
Match the following and choose the correct option from below
A |
Cuticle |
i. |
Guard cells |
B |
Bulliform cells |
ii. |
Single layer |
C |
Stomata |
iii. |
Waxy layer |
D |
Epidermis |
iv. |
Empty colourless cell |
Options:
1. |
A-iii |
B-iv |
C-i |
D-ii |
2. |
A-i |
B-ii |
C-iii |
D-iv |
3. |
A-iii |
B-ii |
C-iv |
D-i |
4. |
A-iii |
B-ii |
C-i |
D-iv |
What is the number of correct statements amongst the following regarding the phloem tissue of plants?
I: | Gymnosperms lack albuminous cells and sieve cells. |
II: | The companion cells are specialized parenchymatous cells. |
III: | Phloem parenchyma is absent in most of the monocotyledons. |
IV: | Phloem fibers are generally absent in the primary phloem. |
1. 0
2. 2
3. 3
4. 4
(i) | The sieve tube elements and companion cells are connected by pit fields present between their common longitudinal walls. |
(ii) | Pholem parenchyma is made of elongated non-tapering cylindrical cells which have scanty cytoplasm. |
(iii) | Pholem fibres are made of parenchymatous cells. |
(iv) | Companion cells help in maintaining the pressure gradient in the sieve tube. |
(v) | The phloem parenchyma stores food material and other substances like resins, latex, and mucilage |
(i) | Epidermal cells have a lower number of chloroplasts or lack them completely, except for the guard cells. |
(ii) | Epidermis is mostly single-layered except in the leaves of Ficus and Peperomia. |
(iii) | Epidermis lack intercellular spaces. |
(iv) | Root epidermis lack cuticle. |
(v) | In plants with secondary growth, the epidermis of roots and stems is usually replaced by a periderm through the action of cork cambium or phellogen. |
Column-I | Column-II | ||
A. | Bean shaped guard cell | (i) | Dicot stem |
B. | Dumb-bell shaped guard cell | (ii) | Monocot leaf |
C. | Trichome | (iii) | Dicot leaf |
D. | Exarch xylem | (iv) | Dicot and monocot root |