NEET Test Series from KOTA - 10 Papers In MS WORD
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Plant kingdom
259496
Winged pollen grains are found in:
1 Pinus
2 Selaginella
3 Cetraria sp.
4 Parmelia sp.
Explanation:
The pinus pollinate profusely giving rise to large number to pollens. The pollen grains of pinus are large due to the presence of sacs or bladders, giving them a winged format. It has two prominent walls, the outer exine made up of sporopollenin which is referred to as one of the most resistant organic material. The inner intine layer is made of cellulose and pectin. Winged pollen grain are found in pinus.
259497
The smallest plant division-Gymnosperm has how many species.
1 640
2 900
3 100
4 300
Explanation:
Gymnosperms are a group of plants that produce seeds not enclosed within the ovary or fruit. It originated about 200 million years ago and were dominant species at that time. There are around 900 living species of this group. Zamia pygmia is the smallest gymnosperm.
VMMC-2013/JIPMER-2003/NEET-1996/IPMT-1996
Plant kingdom
259498
Resin or turpentine oil is obtained from
1 Pinus
2 Cedrus
3 Cycas
4 None of these
Explanation:
Turpentine oil is the liquid formed by the distillation of waxes collected from the pine tree or Pinus. Pinus is a coniferous gymnosperm. The stem of the Pinus is branched containing resin canals that are found in the cortex region. These canals secrete resins that contain turpentine oil. These canals are the type of schizogenous cavities in their origin. It is utilised as a mixture and oil based dyes. Blue pine tree on pinus wellichiana and pinus longifolia are commercial sources of extracting turpentine oil. Dried turpentine is used for flavoring foods and beverages. Resin is a hydrocarbon extract or secretion produced by confers.
Pinus is a conifer that contains resinous substance. They are monoecious in nature which means they have male and female cones on the same tree. The female cone of Pinus is formed by the aggregation of meagasporophylls, which bear ovules. Each megasporophyll consists of a lower bract scale and a larger upper ovuliferous scale. The male and female reproductive structure are microsporangiate or male strabili and megasporangiate of female strobili respectively.
The pinus pollinate profusely giving rise to large number to pollens. The pollen grains of pinus are large due to the presence of sacs or bladders, giving them a winged format. It has two prominent walls, the outer exine made up of sporopollenin which is referred to as one of the most resistant organic material. The inner intine layer is made of cellulose and pectin. Winged pollen grain are found in pinus.
259497
The smallest plant division-Gymnosperm has how many species.
1 640
2 900
3 100
4 300
Explanation:
Gymnosperms are a group of plants that produce seeds not enclosed within the ovary or fruit. It originated about 200 million years ago and were dominant species at that time. There are around 900 living species of this group. Zamia pygmia is the smallest gymnosperm.
VMMC-2013/JIPMER-2003/NEET-1996/IPMT-1996
Plant kingdom
259498
Resin or turpentine oil is obtained from
1 Pinus
2 Cedrus
3 Cycas
4 None of these
Explanation:
Turpentine oil is the liquid formed by the distillation of waxes collected from the pine tree or Pinus. Pinus is a coniferous gymnosperm. The stem of the Pinus is branched containing resin canals that are found in the cortex region. These canals secrete resins that contain turpentine oil. These canals are the type of schizogenous cavities in their origin. It is utilised as a mixture and oil based dyes. Blue pine tree on pinus wellichiana and pinus longifolia are commercial sources of extracting turpentine oil. Dried turpentine is used for flavoring foods and beverages. Resin is a hydrocarbon extract or secretion produced by confers.
Pinus is a conifer that contains resinous substance. They are monoecious in nature which means they have male and female cones on the same tree. The female cone of Pinus is formed by the aggregation of meagasporophylls, which bear ovules. Each megasporophyll consists of a lower bract scale and a larger upper ovuliferous scale. The male and female reproductive structure are microsporangiate or male strabili and megasporangiate of female strobili respectively.
The pinus pollinate profusely giving rise to large number to pollens. The pollen grains of pinus are large due to the presence of sacs or bladders, giving them a winged format. It has two prominent walls, the outer exine made up of sporopollenin which is referred to as one of the most resistant organic material. The inner intine layer is made of cellulose and pectin. Winged pollen grain are found in pinus.
259497
The smallest plant division-Gymnosperm has how many species.
1 640
2 900
3 100
4 300
Explanation:
Gymnosperms are a group of plants that produce seeds not enclosed within the ovary or fruit. It originated about 200 million years ago and were dominant species at that time. There are around 900 living species of this group. Zamia pygmia is the smallest gymnosperm.
VMMC-2013/JIPMER-2003/NEET-1996/IPMT-1996
Plant kingdom
259498
Resin or turpentine oil is obtained from
1 Pinus
2 Cedrus
3 Cycas
4 None of these
Explanation:
Turpentine oil is the liquid formed by the distillation of waxes collected from the pine tree or Pinus. Pinus is a coniferous gymnosperm. The stem of the Pinus is branched containing resin canals that are found in the cortex region. These canals secrete resins that contain turpentine oil. These canals are the type of schizogenous cavities in their origin. It is utilised as a mixture and oil based dyes. Blue pine tree on pinus wellichiana and pinus longifolia are commercial sources of extracting turpentine oil. Dried turpentine is used for flavoring foods and beverages. Resin is a hydrocarbon extract or secretion produced by confers.
Pinus is a conifer that contains resinous substance. They are monoecious in nature which means they have male and female cones on the same tree. The female cone of Pinus is formed by the aggregation of meagasporophylls, which bear ovules. Each megasporophyll consists of a lower bract scale and a larger upper ovuliferous scale. The male and female reproductive structure are microsporangiate or male strabili and megasporangiate of female strobili respectively.
The pinus pollinate profusely giving rise to large number to pollens. The pollen grains of pinus are large due to the presence of sacs or bladders, giving them a winged format. It has two prominent walls, the outer exine made up of sporopollenin which is referred to as one of the most resistant organic material. The inner intine layer is made of cellulose and pectin. Winged pollen grain are found in pinus.
259497
The smallest plant division-Gymnosperm has how many species.
1 640
2 900
3 100
4 300
Explanation:
Gymnosperms are a group of plants that produce seeds not enclosed within the ovary or fruit. It originated about 200 million years ago and were dominant species at that time. There are around 900 living species of this group. Zamia pygmia is the smallest gymnosperm.
VMMC-2013/JIPMER-2003/NEET-1996/IPMT-1996
Plant kingdom
259498
Resin or turpentine oil is obtained from
1 Pinus
2 Cedrus
3 Cycas
4 None of these
Explanation:
Turpentine oil is the liquid formed by the distillation of waxes collected from the pine tree or Pinus. Pinus is a coniferous gymnosperm. The stem of the Pinus is branched containing resin canals that are found in the cortex region. These canals secrete resins that contain turpentine oil. These canals are the type of schizogenous cavities in their origin. It is utilised as a mixture and oil based dyes. Blue pine tree on pinus wellichiana and pinus longifolia are commercial sources of extracting turpentine oil. Dried turpentine is used for flavoring foods and beverages. Resin is a hydrocarbon extract or secretion produced by confers.
Pinus is a conifer that contains resinous substance. They are monoecious in nature which means they have male and female cones on the same tree. The female cone of Pinus is formed by the aggregation of meagasporophylls, which bear ovules. Each megasporophyll consists of a lower bract scale and a larger upper ovuliferous scale. The male and female reproductive structure are microsporangiate or male strabili and megasporangiate of female strobili respectively.
