62320
Specific characteristic hydrochasy is stimulated by presence of special cells in upper epidermis of leaf in ?
1 Mesophytic grasses (bulliform cells)
2 Xerophytic grasses (bulliform cells)
3 Halophytes (bulliform cells)
4 Xerophytes (bulliform cells)
Explanation:
BSome xerophytic grasses possess specific hydrochasy characteristics. Their leaves contain special bulliform cell in upper epidermis. In xeric condition, due to excess evaporation of water these cells shrinks and roll down itself towards inside and reduce the rate of transpiration. Stomata are now closed and shift inside leaves. e.g. :- Ammophila, Agropyron, etc. - Mesophytic grasses- The leaves of mesophytic plants have a variety of leaf shapes, but they are generally flat, thin relatively large, and green in color. - Halophytes- A plant adapted to growing in saline conditions, as in a salt marsh. - Xerophytes- A plant which needs very little water.
UP CPMT-2014
Morphology of Plants
62321
The modification of petiole, which became specialised structure like leaf and carry out photosynthesis:
1 Phylloclade
2 Cladode
3 Phyllode
4 All of these
Explanation:
: The modification of petiole in leaf like flattened structure in some species of acacia perform photosynthesis. This modification of petiole is carried out due to absence of leaf lamina. This flatened petiole is known as phyllode. - phylloclade- A phylloclade is a modification stem responsible for photosythesis. - Cladode- Cladode is a form of modified stem, which is green and fleshy in nature.
UP CPMT-2014
Morphology of Plants
62323
Which is absent in a leaf?
1 Lenticels
2 Stomata
3 Mesophyll
4 Chloroplast
Explanation:
: Lenticels- Leaves do not have lenticels. Lenticels are present in the bark. A lenticel is a tissue having intercellular space. Lenticels are lens-shaped opening in the trunk of woody dicotyledonous plant. It function as pathways for the direct exchange of gases between internal tissue and atmosphere through the bark, which is otherwise impermeable to gases. - Stomata- A stomata, also called a stomate is a pore, found in the epidermis of leaves, stems and other organs, that controls the rate of exchange of gasses. - Mesophyll- is the internal ground tissue located between the two epidermal cell layers of the Leaf - Chloroplast- A chloroplast is an organelle within the cells of plants and certain algae that is the site of photosynthesis, which is the process by which energy from the sun is converted into chemical energy for growth.
UP CPMT-2006
Morphology of Plants
62324
A mature ligule, having prominent basal portion is called:
1 Glossopodium
2 Rhizophore
3 Trichome
4 None of these
Explanation:
A A mature ligule having prominent basal portion is called Glossopodium. The ligule is a leaf like structure which is present on the adaxial side of the leaf. The ligule is considered to be secretory organ for keeping the sporangium and young leaves moisture also considered as protective structure of sporangium and leaves.
62320
Specific characteristic hydrochasy is stimulated by presence of special cells in upper epidermis of leaf in ?
1 Mesophytic grasses (bulliform cells)
2 Xerophytic grasses (bulliform cells)
3 Halophytes (bulliform cells)
4 Xerophytes (bulliform cells)
Explanation:
BSome xerophytic grasses possess specific hydrochasy characteristics. Their leaves contain special bulliform cell in upper epidermis. In xeric condition, due to excess evaporation of water these cells shrinks and roll down itself towards inside and reduce the rate of transpiration. Stomata are now closed and shift inside leaves. e.g. :- Ammophila, Agropyron, etc. - Mesophytic grasses- The leaves of mesophytic plants have a variety of leaf shapes, but they are generally flat, thin relatively large, and green in color. - Halophytes- A plant adapted to growing in saline conditions, as in a salt marsh. - Xerophytes- A plant which needs very little water.
UP CPMT-2014
Morphology of Plants
62321
The modification of petiole, which became specialised structure like leaf and carry out photosynthesis:
1 Phylloclade
2 Cladode
3 Phyllode
4 All of these
Explanation:
: The modification of petiole in leaf like flattened structure in some species of acacia perform photosynthesis. This modification of petiole is carried out due to absence of leaf lamina. This flatened petiole is known as phyllode. - phylloclade- A phylloclade is a modification stem responsible for photosythesis. - Cladode- Cladode is a form of modified stem, which is green and fleshy in nature.
UP CPMT-2014
Morphology of Plants
62323
Which is absent in a leaf?
1 Lenticels
2 Stomata
3 Mesophyll
4 Chloroplast
Explanation:
: Lenticels- Leaves do not have lenticels. Lenticels are present in the bark. A lenticel is a tissue having intercellular space. Lenticels are lens-shaped opening in the trunk of woody dicotyledonous plant. It function as pathways for the direct exchange of gases between internal tissue and atmosphere through the bark, which is otherwise impermeable to gases. - Stomata- A stomata, also called a stomate is a pore, found in the epidermis of leaves, stems and other organs, that controls the rate of exchange of gasses. - Mesophyll- is the internal ground tissue located between the two epidermal cell layers of the Leaf - Chloroplast- A chloroplast is an organelle within the cells of plants and certain algae that is the site of photosynthesis, which is the process by which energy from the sun is converted into chemical energy for growth.
UP CPMT-2006
Morphology of Plants
62324
A mature ligule, having prominent basal portion is called:
1 Glossopodium
2 Rhizophore
3 Trichome
4 None of these
Explanation:
A A mature ligule having prominent basal portion is called Glossopodium. The ligule is a leaf like structure which is present on the adaxial side of the leaf. The ligule is considered to be secretory organ for keeping the sporangium and young leaves moisture also considered as protective structure of sporangium and leaves.
62320
Specific characteristic hydrochasy is stimulated by presence of special cells in upper epidermis of leaf in ?
1 Mesophytic grasses (bulliform cells)
2 Xerophytic grasses (bulliform cells)
3 Halophytes (bulliform cells)
4 Xerophytes (bulliform cells)
Explanation:
BSome xerophytic grasses possess specific hydrochasy characteristics. Their leaves contain special bulliform cell in upper epidermis. In xeric condition, due to excess evaporation of water these cells shrinks and roll down itself towards inside and reduce the rate of transpiration. Stomata are now closed and shift inside leaves. e.g. :- Ammophila, Agropyron, etc. - Mesophytic grasses- The leaves of mesophytic plants have a variety of leaf shapes, but they are generally flat, thin relatively large, and green in color. - Halophytes- A plant adapted to growing in saline conditions, as in a salt marsh. - Xerophytes- A plant which needs very little water.
UP CPMT-2014
Morphology of Plants
62321
The modification of petiole, which became specialised structure like leaf and carry out photosynthesis:
1 Phylloclade
2 Cladode
3 Phyllode
4 All of these
Explanation:
: The modification of petiole in leaf like flattened structure in some species of acacia perform photosynthesis. This modification of petiole is carried out due to absence of leaf lamina. This flatened petiole is known as phyllode. - phylloclade- A phylloclade is a modification stem responsible for photosythesis. - Cladode- Cladode is a form of modified stem, which is green and fleshy in nature.
UP CPMT-2014
Morphology of Plants
62323
Which is absent in a leaf?
1 Lenticels
2 Stomata
3 Mesophyll
4 Chloroplast
Explanation:
: Lenticels- Leaves do not have lenticels. Lenticels are present in the bark. A lenticel is a tissue having intercellular space. Lenticels are lens-shaped opening in the trunk of woody dicotyledonous plant. It function as pathways for the direct exchange of gases between internal tissue and atmosphere through the bark, which is otherwise impermeable to gases. - Stomata- A stomata, also called a stomate is a pore, found in the epidermis of leaves, stems and other organs, that controls the rate of exchange of gasses. - Mesophyll- is the internal ground tissue located between the two epidermal cell layers of the Leaf - Chloroplast- A chloroplast is an organelle within the cells of plants and certain algae that is the site of photosynthesis, which is the process by which energy from the sun is converted into chemical energy for growth.
UP CPMT-2006
Morphology of Plants
62324
A mature ligule, having prominent basal portion is called:
1 Glossopodium
2 Rhizophore
3 Trichome
4 None of these
Explanation:
A A mature ligule having prominent basal portion is called Glossopodium. The ligule is a leaf like structure which is present on the adaxial side of the leaf. The ligule is considered to be secretory organ for keeping the sporangium and young leaves moisture also considered as protective structure of sporangium and leaves.
62320
Specific characteristic hydrochasy is stimulated by presence of special cells in upper epidermis of leaf in ?
1 Mesophytic grasses (bulliform cells)
2 Xerophytic grasses (bulliform cells)
3 Halophytes (bulliform cells)
4 Xerophytes (bulliform cells)
Explanation:
BSome xerophytic grasses possess specific hydrochasy characteristics. Their leaves contain special bulliform cell in upper epidermis. In xeric condition, due to excess evaporation of water these cells shrinks and roll down itself towards inside and reduce the rate of transpiration. Stomata are now closed and shift inside leaves. e.g. :- Ammophila, Agropyron, etc. - Mesophytic grasses- The leaves of mesophytic plants have a variety of leaf shapes, but they are generally flat, thin relatively large, and green in color. - Halophytes- A plant adapted to growing in saline conditions, as in a salt marsh. - Xerophytes- A plant which needs very little water.
UP CPMT-2014
Morphology of Plants
62321
The modification of petiole, which became specialised structure like leaf and carry out photosynthesis:
1 Phylloclade
2 Cladode
3 Phyllode
4 All of these
Explanation:
: The modification of petiole in leaf like flattened structure in some species of acacia perform photosynthesis. This modification of petiole is carried out due to absence of leaf lamina. This flatened petiole is known as phyllode. - phylloclade- A phylloclade is a modification stem responsible for photosythesis. - Cladode- Cladode is a form of modified stem, which is green and fleshy in nature.
UP CPMT-2014
Morphology of Plants
62323
Which is absent in a leaf?
1 Lenticels
2 Stomata
3 Mesophyll
4 Chloroplast
Explanation:
: Lenticels- Leaves do not have lenticels. Lenticels are present in the bark. A lenticel is a tissue having intercellular space. Lenticels are lens-shaped opening in the trunk of woody dicotyledonous plant. It function as pathways for the direct exchange of gases between internal tissue and atmosphere through the bark, which is otherwise impermeable to gases. - Stomata- A stomata, also called a stomate is a pore, found in the epidermis of leaves, stems and other organs, that controls the rate of exchange of gasses. - Mesophyll- is the internal ground tissue located between the two epidermal cell layers of the Leaf - Chloroplast- A chloroplast is an organelle within the cells of plants and certain algae that is the site of photosynthesis, which is the process by which energy from the sun is converted into chemical energy for growth.
UP CPMT-2006
Morphology of Plants
62324
A mature ligule, having prominent basal portion is called:
1 Glossopodium
2 Rhizophore
3 Trichome
4 None of these
Explanation:
A A mature ligule having prominent basal portion is called Glossopodium. The ligule is a leaf like structure which is present on the adaxial side of the leaf. The ligule is considered to be secretory organ for keeping the sporangium and young leaves moisture also considered as protective structure of sporangium and leaves.
