The phellogen or cork cambium cells divide periclinal cutting off cells towards the outside and inside.the cells cutoff toward the outside becomes suberised and dead, these are compactly packed in radial rows without intercellular spaces and form cork or phellem.
AIPMT - 2012
BIOXI06: ANATOMY OF FLOWERING PLANTS
333676
Statement A : Parenchymatous cells rupture the epidermis, forming a lensshaped openings called lenticels. Statement B : Lenticels permit the exchange of gases between the outer atmosphere and the internal tissue of the stem
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Both the statements are correct. At certain regions, the phellogen cuts off closely arranged parenchymatous cells on the outer side instead of cork cells. These parenchymatous cells soon rupture the epidermis, forming a lensshaped openings called lenticels. Lenticels permit the exchange of gases between the outer atmosphere and the internal tissue of the stem. These occur in most woody trees.
BIOXI06: ANATOMY OF FLOWERING PLANTS
333677
The waxy substance associated with cell walls of cork cells are impervious to
1 Air
2 Oils
3 Water
4 1 and 3
Explanation:
A mature cork cell is non-living and has cell walls that are composed of a waxy substance that is highly impermeable to gases and water called suberin. The cork is impervious to water due to suberin deposition in the cell
BIOXI06: ANATOMY OF FLOWERING PLANTS
333678
Secondary growth in the cortical region of a dicot stem is due to the activity of
1 Periderm
2 Phellem
3 Phellogen
4 Phelloderm
Explanation:
Meristematic tissue called cork cambium or phellogen develops in the cortex region which is responsible for secondary growth in the cortical region of dicot stem.
The phellogen or cork cambium cells divide periclinal cutting off cells towards the outside and inside.the cells cutoff toward the outside becomes suberised and dead, these are compactly packed in radial rows without intercellular spaces and form cork or phellem.
AIPMT - 2012
BIOXI06: ANATOMY OF FLOWERING PLANTS
333676
Statement A : Parenchymatous cells rupture the epidermis, forming a lensshaped openings called lenticels. Statement B : Lenticels permit the exchange of gases between the outer atmosphere and the internal tissue of the stem
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Both the statements are correct. At certain regions, the phellogen cuts off closely arranged parenchymatous cells on the outer side instead of cork cells. These parenchymatous cells soon rupture the epidermis, forming a lensshaped openings called lenticels. Lenticels permit the exchange of gases between the outer atmosphere and the internal tissue of the stem. These occur in most woody trees.
BIOXI06: ANATOMY OF FLOWERING PLANTS
333677
The waxy substance associated with cell walls of cork cells are impervious to
1 Air
2 Oils
3 Water
4 1 and 3
Explanation:
A mature cork cell is non-living and has cell walls that are composed of a waxy substance that is highly impermeable to gases and water called suberin. The cork is impervious to water due to suberin deposition in the cell
BIOXI06: ANATOMY OF FLOWERING PLANTS
333678
Secondary growth in the cortical region of a dicot stem is due to the activity of
1 Periderm
2 Phellem
3 Phellogen
4 Phelloderm
Explanation:
Meristematic tissue called cork cambium or phellogen develops in the cortex region which is responsible for secondary growth in the cortical region of dicot stem.
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BIOXI06: ANATOMY OF FLOWERING PLANTS
333675
The common bottle cork is a product of
1 Dermatogen
2 Phellogen
3 Xylem
4 Vascular cambium
Explanation:
The phellogen or cork cambium cells divide periclinal cutting off cells towards the outside and inside.the cells cutoff toward the outside becomes suberised and dead, these are compactly packed in radial rows without intercellular spaces and form cork or phellem.
AIPMT - 2012
BIOXI06: ANATOMY OF FLOWERING PLANTS
333676
Statement A : Parenchymatous cells rupture the epidermis, forming a lensshaped openings called lenticels. Statement B : Lenticels permit the exchange of gases between the outer atmosphere and the internal tissue of the stem
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Both the statements are correct. At certain regions, the phellogen cuts off closely arranged parenchymatous cells on the outer side instead of cork cells. These parenchymatous cells soon rupture the epidermis, forming a lensshaped openings called lenticels. Lenticels permit the exchange of gases between the outer atmosphere and the internal tissue of the stem. These occur in most woody trees.
BIOXI06: ANATOMY OF FLOWERING PLANTS
333677
The waxy substance associated with cell walls of cork cells are impervious to
1 Air
2 Oils
3 Water
4 1 and 3
Explanation:
A mature cork cell is non-living and has cell walls that are composed of a waxy substance that is highly impermeable to gases and water called suberin. The cork is impervious to water due to suberin deposition in the cell
BIOXI06: ANATOMY OF FLOWERING PLANTS
333678
Secondary growth in the cortical region of a dicot stem is due to the activity of
1 Periderm
2 Phellem
3 Phellogen
4 Phelloderm
Explanation:
Meristematic tissue called cork cambium or phellogen develops in the cortex region which is responsible for secondary growth in the cortical region of dicot stem.
The phellogen or cork cambium cells divide periclinal cutting off cells towards the outside and inside.the cells cutoff toward the outside becomes suberised and dead, these are compactly packed in radial rows without intercellular spaces and form cork or phellem.
AIPMT - 2012
BIOXI06: ANATOMY OF FLOWERING PLANTS
333676
Statement A : Parenchymatous cells rupture the epidermis, forming a lensshaped openings called lenticels. Statement B : Lenticels permit the exchange of gases between the outer atmosphere and the internal tissue of the stem
1 Statement A is correct but Statement B is incorrect.
2 Statement A is incorrect but Statement B is correct.
3 Both statements are correct.
4 Both Statements are incorrect.
Explanation:
Both the statements are correct. At certain regions, the phellogen cuts off closely arranged parenchymatous cells on the outer side instead of cork cells. These parenchymatous cells soon rupture the epidermis, forming a lensshaped openings called lenticels. Lenticels permit the exchange of gases between the outer atmosphere and the internal tissue of the stem. These occur in most woody trees.
BIOXI06: ANATOMY OF FLOWERING PLANTS
333677
The waxy substance associated with cell walls of cork cells are impervious to
1 Air
2 Oils
3 Water
4 1 and 3
Explanation:
A mature cork cell is non-living and has cell walls that are composed of a waxy substance that is highly impermeable to gases and water called suberin. The cork is impervious to water due to suberin deposition in the cell
BIOXI06: ANATOMY OF FLOWERING PLANTS
333678
Secondary growth in the cortical region of a dicot stem is due to the activity of
1 Periderm
2 Phellem
3 Phellogen
4 Phelloderm
Explanation:
Meristematic tissue called cork cambium or phellogen develops in the cortex region which is responsible for secondary growth in the cortical region of dicot stem.