260322
A place was rocky and barren but now there is a green forest; the sequence of origin is:
1 lichen, moss, herbs, shrubs
2 moss, lichen, herbs, shrubs
3 lichen, moss, shrubs, herbs
4 shrubs, herbs moss, lichen
Explanation:
The ecological succession taking place in a dry area is called xerarch. The stages through which it occurs on a base rock constitute the lithosere. The rocky \& barren place is deficient in water \& lacks any organic matter having only minerals in disintegrated or weathered state, the pioneer to colonies this primitive substraction are crustose types of lichen. The lithosere in the following account are crustose lichen stage Foliose lichen stage, mass stage, Herb stage, shrubs stage.
Rajasthan PMT-2005
Ecosystem
260309
The second stage of hydrosere is occupied by plants like
1 Salix
2 Vallisneria
3 Azolla
4 Typha
Explanation:
Development of biotic, aquatic organisms community in a newly formed pond or lake is called hydrosere. - It starts as soon as the muddy water becomes clear. The pioneer stage of hydrosere is plankton stage. - Death and decomposition of planktons in the first seral stage of hydrosere produces organic matter which mixes up with clay and silt at the bottom to form soft mud which is favorable for growth of submerged hydrophytes in the next seral stage. - Hence the second stage of hydrosere is occupied by submerged hydrophytes like Vallisnaria, Myriophyllum, Eladea, Hydrilla, and Ceratophyllum.
AIPMT (Mains)-2012
Ecosystem
260310
All successions irrespective of the habitat proceed to which type of climax community?
1 Xeric
2 Mesic
3 Hydrophytic
4 Edaphic
Explanation:
The ecological succession is mainly of two types:- primary succession which starts where no organism is present. For example- Bare rocks or cooled volcanoes. while secondary succession occurs in the area where the living organisms were lost due to certain reasons like a forest fire or earthquake, etc. - Mesic Climax community:- During primary succession on rocks the pioneer species or lichens. They are able to secrete acids to dissolve rock thus helping in weathering and soil formation and the little soil leads to the growth of bryophytes. With time these bryophytes are replaced by bigger plants and ultimately a stable forest community is formed and ultimately the xerophytes habitat gets converted into a mesophytic one.
NEET (Re-Exam)-04.09.2022
Ecosystem
260311
The species that come to appear in bare area are called:
1 Pioneer species
2 Invasive species
3 Competitive species
4 Species of seral community
Explanation:
The term pioneer is used to describe the species that first colonize new habitats created by disturbance. Invasive species:- Those species which introduce outside their natural habitate. - Zebra mussels are native to the black sea \& caspian sea in central asia but arived in the great lake of North America, accidently. - Competitive species- Animals from the same species commonly compete with each other in their community. - "Pioneer species are entities which are particularly adapted to colonize the lifeless, barren regions and start an ecological community". The first organisms appearing in the regions of primary succession are pioneer species (usually lichens or mosses). They are the first species present. They must be strong and hardy.
260322
A place was rocky and barren but now there is a green forest; the sequence of origin is:
1 lichen, moss, herbs, shrubs
2 moss, lichen, herbs, shrubs
3 lichen, moss, shrubs, herbs
4 shrubs, herbs moss, lichen
Explanation:
The ecological succession taking place in a dry area is called xerarch. The stages through which it occurs on a base rock constitute the lithosere. The rocky \& barren place is deficient in water \& lacks any organic matter having only minerals in disintegrated or weathered state, the pioneer to colonies this primitive substraction are crustose types of lichen. The lithosere in the following account are crustose lichen stage Foliose lichen stage, mass stage, Herb stage, shrubs stage.
Rajasthan PMT-2005
Ecosystem
260309
The second stage of hydrosere is occupied by plants like
1 Salix
2 Vallisneria
3 Azolla
4 Typha
Explanation:
Development of biotic, aquatic organisms community in a newly formed pond or lake is called hydrosere. - It starts as soon as the muddy water becomes clear. The pioneer stage of hydrosere is plankton stage. - Death and decomposition of planktons in the first seral stage of hydrosere produces organic matter which mixes up with clay and silt at the bottom to form soft mud which is favorable for growth of submerged hydrophytes in the next seral stage. - Hence the second stage of hydrosere is occupied by submerged hydrophytes like Vallisnaria, Myriophyllum, Eladea, Hydrilla, and Ceratophyllum.
AIPMT (Mains)-2012
Ecosystem
260310
All successions irrespective of the habitat proceed to which type of climax community?
1 Xeric
2 Mesic
3 Hydrophytic
4 Edaphic
Explanation:
The ecological succession is mainly of two types:- primary succession which starts where no organism is present. For example- Bare rocks or cooled volcanoes. while secondary succession occurs in the area where the living organisms were lost due to certain reasons like a forest fire or earthquake, etc. - Mesic Climax community:- During primary succession on rocks the pioneer species or lichens. They are able to secrete acids to dissolve rock thus helping in weathering and soil formation and the little soil leads to the growth of bryophytes. With time these bryophytes are replaced by bigger plants and ultimately a stable forest community is formed and ultimately the xerophytes habitat gets converted into a mesophytic one.
NEET (Re-Exam)-04.09.2022
Ecosystem
260311
The species that come to appear in bare area are called:
1 Pioneer species
2 Invasive species
3 Competitive species
4 Species of seral community
Explanation:
The term pioneer is used to describe the species that first colonize new habitats created by disturbance. Invasive species:- Those species which introduce outside their natural habitate. - Zebra mussels are native to the black sea \& caspian sea in central asia but arived in the great lake of North America, accidently. - Competitive species- Animals from the same species commonly compete with each other in their community. - "Pioneer species are entities which are particularly adapted to colonize the lifeless, barren regions and start an ecological community". The first organisms appearing in the regions of primary succession are pioneer species (usually lichens or mosses). They are the first species present. They must be strong and hardy.
260322
A place was rocky and barren but now there is a green forest; the sequence of origin is:
1 lichen, moss, herbs, shrubs
2 moss, lichen, herbs, shrubs
3 lichen, moss, shrubs, herbs
4 shrubs, herbs moss, lichen
Explanation:
The ecological succession taking place in a dry area is called xerarch. The stages through which it occurs on a base rock constitute the lithosere. The rocky \& barren place is deficient in water \& lacks any organic matter having only minerals in disintegrated or weathered state, the pioneer to colonies this primitive substraction are crustose types of lichen. The lithosere in the following account are crustose lichen stage Foliose lichen stage, mass stage, Herb stage, shrubs stage.
Rajasthan PMT-2005
Ecosystem
260309
The second stage of hydrosere is occupied by plants like
1 Salix
2 Vallisneria
3 Azolla
4 Typha
Explanation:
Development of biotic, aquatic organisms community in a newly formed pond or lake is called hydrosere. - It starts as soon as the muddy water becomes clear. The pioneer stage of hydrosere is plankton stage. - Death and decomposition of planktons in the first seral stage of hydrosere produces organic matter which mixes up with clay and silt at the bottom to form soft mud which is favorable for growth of submerged hydrophytes in the next seral stage. - Hence the second stage of hydrosere is occupied by submerged hydrophytes like Vallisnaria, Myriophyllum, Eladea, Hydrilla, and Ceratophyllum.
AIPMT (Mains)-2012
Ecosystem
260310
All successions irrespective of the habitat proceed to which type of climax community?
1 Xeric
2 Mesic
3 Hydrophytic
4 Edaphic
Explanation:
The ecological succession is mainly of two types:- primary succession which starts where no organism is present. For example- Bare rocks or cooled volcanoes. while secondary succession occurs in the area where the living organisms were lost due to certain reasons like a forest fire or earthquake, etc. - Mesic Climax community:- During primary succession on rocks the pioneer species or lichens. They are able to secrete acids to dissolve rock thus helping in weathering and soil formation and the little soil leads to the growth of bryophytes. With time these bryophytes are replaced by bigger plants and ultimately a stable forest community is formed and ultimately the xerophytes habitat gets converted into a mesophytic one.
NEET (Re-Exam)-04.09.2022
Ecosystem
260311
The species that come to appear in bare area are called:
1 Pioneer species
2 Invasive species
3 Competitive species
4 Species of seral community
Explanation:
The term pioneer is used to describe the species that first colonize new habitats created by disturbance. Invasive species:- Those species which introduce outside their natural habitate. - Zebra mussels are native to the black sea \& caspian sea in central asia but arived in the great lake of North America, accidently. - Competitive species- Animals from the same species commonly compete with each other in their community. - "Pioneer species are entities which are particularly adapted to colonize the lifeless, barren regions and start an ecological community". The first organisms appearing in the regions of primary succession are pioneer species (usually lichens or mosses). They are the first species present. They must be strong and hardy.
260322
A place was rocky and barren but now there is a green forest; the sequence of origin is:
1 lichen, moss, herbs, shrubs
2 moss, lichen, herbs, shrubs
3 lichen, moss, shrubs, herbs
4 shrubs, herbs moss, lichen
Explanation:
The ecological succession taking place in a dry area is called xerarch. The stages through which it occurs on a base rock constitute the lithosere. The rocky \& barren place is deficient in water \& lacks any organic matter having only minerals in disintegrated or weathered state, the pioneer to colonies this primitive substraction are crustose types of lichen. The lithosere in the following account are crustose lichen stage Foliose lichen stage, mass stage, Herb stage, shrubs stage.
Rajasthan PMT-2005
Ecosystem
260309
The second stage of hydrosere is occupied by plants like
1 Salix
2 Vallisneria
3 Azolla
4 Typha
Explanation:
Development of biotic, aquatic organisms community in a newly formed pond or lake is called hydrosere. - It starts as soon as the muddy water becomes clear. The pioneer stage of hydrosere is plankton stage. - Death and decomposition of planktons in the first seral stage of hydrosere produces organic matter which mixes up with clay and silt at the bottom to form soft mud which is favorable for growth of submerged hydrophytes in the next seral stage. - Hence the second stage of hydrosere is occupied by submerged hydrophytes like Vallisnaria, Myriophyllum, Eladea, Hydrilla, and Ceratophyllum.
AIPMT (Mains)-2012
Ecosystem
260310
All successions irrespective of the habitat proceed to which type of climax community?
1 Xeric
2 Mesic
3 Hydrophytic
4 Edaphic
Explanation:
The ecological succession is mainly of two types:- primary succession which starts where no organism is present. For example- Bare rocks or cooled volcanoes. while secondary succession occurs in the area where the living organisms were lost due to certain reasons like a forest fire or earthquake, etc. - Mesic Climax community:- During primary succession on rocks the pioneer species or lichens. They are able to secrete acids to dissolve rock thus helping in weathering and soil formation and the little soil leads to the growth of bryophytes. With time these bryophytes are replaced by bigger plants and ultimately a stable forest community is formed and ultimately the xerophytes habitat gets converted into a mesophytic one.
NEET (Re-Exam)-04.09.2022
Ecosystem
260311
The species that come to appear in bare area are called:
1 Pioneer species
2 Invasive species
3 Competitive species
4 Species of seral community
Explanation:
The term pioneer is used to describe the species that first colonize new habitats created by disturbance. Invasive species:- Those species which introduce outside their natural habitate. - Zebra mussels are native to the black sea \& caspian sea in central asia but arived in the great lake of North America, accidently. - Competitive species- Animals from the same species commonly compete with each other in their community. - "Pioneer species are entities which are particularly adapted to colonize the lifeless, barren regions and start an ecological community". The first organisms appearing in the regions of primary succession are pioneer species (usually lichens or mosses). They are the first species present. They must be strong and hardy.
