259621
The sclerenchyma of the hypodermis in the Pinus needle helps in
1 Increasing the absorptive surface of the cell
2 checking transpiration
3 mechanical support
4 photosynthesis
Explanation:
Sclerenchyma provides mechanical support in the pinus needle as it has thick walls. - Sclerenchyma tissues are permanent tissue that are long, dead, and thick cells without any intercellular spaces. - Their function is to provide mechanical support to the plant which is due to the absence of interrelate spaces. Sclerenchyma can either be fibres or sclereid. A thick cuticle covers the outer part of the epidermis which helps to examine the transpiration.
VMMC-2005 / AMU-2004 / BVP-2003
Plant kingdom
259622
Pollen grains in Pinus are
1 Monosaccate
2 Bisaccate
3 Trisaccate
4 Nonsaccate
Explanation:
The pollen grains in pinus are Bisaccate. In Pinus, Pollen grains is unicellular, three layered: outer exine, the middle exointine and innermost intine. - In some cases pollen grains of Pinus are bisaccate i.e. have two sacs (air sacs) within the wings like structure that are responsible for their bouyancy.
J and K CET-2007
Plant kingdom
259623
Coralloid roots in Cycas have a symbiotic blue green alga that forms an algal zone in such roots. This alga is
1 Aulosira
2 Anabaena
3 Oscillatoria
4 Chlorella
Explanation:
Cyanobacteria live in symbiosis, only few species and one of the species is Anabaena. It shows a symbiotic relationship with cycas. - Coralloid roots is observed in the cycas. It is developed in clusters at the base of the stem and comes out over the ground. - Cyanobacteria play a role in fixation of nitrogen with the help of nitrogenase.
CG PMT-2011
Plant kingdom
259626
Microsporangium of Cycas is placed in which of the following manner on microsporophyll ?
1 Marginal
2 Adaxial
3 Abaxial
4 Lateral
Explanation:
The microsporophylls are arranged spirally and each microsporophylls has 2 (two) microsporangia which are arranged abaxial (away from the stem or leaves). - Within sporangia two kinds of spores are produced one is arranged spirally along an axis to from lax or compact strobili or cones.
259621
The sclerenchyma of the hypodermis in the Pinus needle helps in
1 Increasing the absorptive surface of the cell
2 checking transpiration
3 mechanical support
4 photosynthesis
Explanation:
Sclerenchyma provides mechanical support in the pinus needle as it has thick walls. - Sclerenchyma tissues are permanent tissue that are long, dead, and thick cells without any intercellular spaces. - Their function is to provide mechanical support to the plant which is due to the absence of interrelate spaces. Sclerenchyma can either be fibres or sclereid. A thick cuticle covers the outer part of the epidermis which helps to examine the transpiration.
VMMC-2005 / AMU-2004 / BVP-2003
Plant kingdom
259622
Pollen grains in Pinus are
1 Monosaccate
2 Bisaccate
3 Trisaccate
4 Nonsaccate
Explanation:
The pollen grains in pinus are Bisaccate. In Pinus, Pollen grains is unicellular, three layered: outer exine, the middle exointine and innermost intine. - In some cases pollen grains of Pinus are bisaccate i.e. have two sacs (air sacs) within the wings like structure that are responsible for their bouyancy.
J and K CET-2007
Plant kingdom
259623
Coralloid roots in Cycas have a symbiotic blue green alga that forms an algal zone in such roots. This alga is
1 Aulosira
2 Anabaena
3 Oscillatoria
4 Chlorella
Explanation:
Cyanobacteria live in symbiosis, only few species and one of the species is Anabaena. It shows a symbiotic relationship with cycas. - Coralloid roots is observed in the cycas. It is developed in clusters at the base of the stem and comes out over the ground. - Cyanobacteria play a role in fixation of nitrogen with the help of nitrogenase.
CG PMT-2011
Plant kingdom
259626
Microsporangium of Cycas is placed in which of the following manner on microsporophyll ?
1 Marginal
2 Adaxial
3 Abaxial
4 Lateral
Explanation:
The microsporophylls are arranged spirally and each microsporophylls has 2 (two) microsporangia which are arranged abaxial (away from the stem or leaves). - Within sporangia two kinds of spores are produced one is arranged spirally along an axis to from lax or compact strobili or cones.
259621
The sclerenchyma of the hypodermis in the Pinus needle helps in
1 Increasing the absorptive surface of the cell
2 checking transpiration
3 mechanical support
4 photosynthesis
Explanation:
Sclerenchyma provides mechanical support in the pinus needle as it has thick walls. - Sclerenchyma tissues are permanent tissue that are long, dead, and thick cells without any intercellular spaces. - Their function is to provide mechanical support to the plant which is due to the absence of interrelate spaces. Sclerenchyma can either be fibres or sclereid. A thick cuticle covers the outer part of the epidermis which helps to examine the transpiration.
VMMC-2005 / AMU-2004 / BVP-2003
Plant kingdom
259622
Pollen grains in Pinus are
1 Monosaccate
2 Bisaccate
3 Trisaccate
4 Nonsaccate
Explanation:
The pollen grains in pinus are Bisaccate. In Pinus, Pollen grains is unicellular, three layered: outer exine, the middle exointine and innermost intine. - In some cases pollen grains of Pinus are bisaccate i.e. have two sacs (air sacs) within the wings like structure that are responsible for their bouyancy.
J and K CET-2007
Plant kingdom
259623
Coralloid roots in Cycas have a symbiotic blue green alga that forms an algal zone in such roots. This alga is
1 Aulosira
2 Anabaena
3 Oscillatoria
4 Chlorella
Explanation:
Cyanobacteria live in symbiosis, only few species and one of the species is Anabaena. It shows a symbiotic relationship with cycas. - Coralloid roots is observed in the cycas. It is developed in clusters at the base of the stem and comes out over the ground. - Cyanobacteria play a role in fixation of nitrogen with the help of nitrogenase.
CG PMT-2011
Plant kingdom
259626
Microsporangium of Cycas is placed in which of the following manner on microsporophyll ?
1 Marginal
2 Adaxial
3 Abaxial
4 Lateral
Explanation:
The microsporophylls are arranged spirally and each microsporophylls has 2 (two) microsporangia which are arranged abaxial (away from the stem or leaves). - Within sporangia two kinds of spores are produced one is arranged spirally along an axis to from lax or compact strobili or cones.
259621
The sclerenchyma of the hypodermis in the Pinus needle helps in
1 Increasing the absorptive surface of the cell
2 checking transpiration
3 mechanical support
4 photosynthesis
Explanation:
Sclerenchyma provides mechanical support in the pinus needle as it has thick walls. - Sclerenchyma tissues are permanent tissue that are long, dead, and thick cells without any intercellular spaces. - Their function is to provide mechanical support to the plant which is due to the absence of interrelate spaces. Sclerenchyma can either be fibres or sclereid. A thick cuticle covers the outer part of the epidermis which helps to examine the transpiration.
VMMC-2005 / AMU-2004 / BVP-2003
Plant kingdom
259622
Pollen grains in Pinus are
1 Monosaccate
2 Bisaccate
3 Trisaccate
4 Nonsaccate
Explanation:
The pollen grains in pinus are Bisaccate. In Pinus, Pollen grains is unicellular, three layered: outer exine, the middle exointine and innermost intine. - In some cases pollen grains of Pinus are bisaccate i.e. have two sacs (air sacs) within the wings like structure that are responsible for their bouyancy.
J and K CET-2007
Plant kingdom
259623
Coralloid roots in Cycas have a symbiotic blue green alga that forms an algal zone in such roots. This alga is
1 Aulosira
2 Anabaena
3 Oscillatoria
4 Chlorella
Explanation:
Cyanobacteria live in symbiosis, only few species and one of the species is Anabaena. It shows a symbiotic relationship with cycas. - Coralloid roots is observed in the cycas. It is developed in clusters at the base of the stem and comes out over the ground. - Cyanobacteria play a role in fixation of nitrogen with the help of nitrogenase.
CG PMT-2011
Plant kingdom
259626
Microsporangium of Cycas is placed in which of the following manner on microsporophyll ?
1 Marginal
2 Adaxial
3 Abaxial
4 Lateral
Explanation:
The microsporophylls are arranged spirally and each microsporophylls has 2 (two) microsporangia which are arranged abaxial (away from the stem or leaves). - Within sporangia two kinds of spores are produced one is arranged spirally along an axis to from lax or compact strobili or cones.
