260328
Which of the following would appear as the pioneer organisms on bare rocks
1 Green algae
2 Lichens
3 Liverworts
4 Mosses
Explanation:
On bare rocks, Lichens are pioneer as they secretes carbonic acid which leads to rock weathering and creation of soil (Pedogenesis). They inrich the soil by trapping water, dust and silt. When lichens die they contributes organic matter to the soil, improving the soil so that other plants can grow there. Thus pioneering life in a barren area. - Green algae- Green algae are an important food Source for aquatic organisms \& others - Mosses - Mosses are used as Antimicrobial.
NEET-2016 Phase-I
Ecosystem
260330
Which one of the following statements is correct for secondary succession?
1 It is similar to primary succession except that it has a relatively fast pace
2 It begins on a bare rock
3 It occurs on deforested site
4 It follows primary succession
Explanation:
Secondary succession occurs when the severity of disturbance is insufficient to remove all the existing vegetation and soil from a site. A classic example of secondary succession occurs in oak and hickory forests cleared by wildfire. - Primary succession occurs in the land where there is no initial vegetation whereas secondary succession occurs in a land that has primary vegetation.
AIPMT (Screening)-2011
Ecosystem
260306
Which of the following statements is correct?
1 Algal Bloom decreases fish mortality
2 Eutrophication refers to increase in domestic sewage and waste water in lakes.
3 Biomagnification refers to increase in concentration of the toxicant at successive trophic levels.
4 Presence of large amount of nutrients in water restricts 'Algal Bloom'.
Explanation:
Biomagnification (also termed as bioamplification) in toxicology terms defined as the increase in concentration of the substance that is toxic to the individual like pesticide at the successive trophic levels in a food chain.
NEET (UG) 07.05.2023
Ecosystem
260307
Lichen is the pioneer vegetation on which succession?
1 Hydrosere
2 Lithosere
3 Psammosere
4 Xerosere
Explanation:
Lichens are considered as pioneer species in primary succession on rocks because they can easily grow on rocks where other plants cannot grow. They produce oxalic acid which induced the weathering of rocks and thus soil is formed.
260328
Which of the following would appear as the pioneer organisms on bare rocks
1 Green algae
2 Lichens
3 Liverworts
4 Mosses
Explanation:
On bare rocks, Lichens are pioneer as they secretes carbonic acid which leads to rock weathering and creation of soil (Pedogenesis). They inrich the soil by trapping water, dust and silt. When lichens die they contributes organic matter to the soil, improving the soil so that other plants can grow there. Thus pioneering life in a barren area. - Green algae- Green algae are an important food Source for aquatic organisms \& others - Mosses - Mosses are used as Antimicrobial.
NEET-2016 Phase-I
Ecosystem
260330
Which one of the following statements is correct for secondary succession?
1 It is similar to primary succession except that it has a relatively fast pace
2 It begins on a bare rock
3 It occurs on deforested site
4 It follows primary succession
Explanation:
Secondary succession occurs when the severity of disturbance is insufficient to remove all the existing vegetation and soil from a site. A classic example of secondary succession occurs in oak and hickory forests cleared by wildfire. - Primary succession occurs in the land where there is no initial vegetation whereas secondary succession occurs in a land that has primary vegetation.
AIPMT (Screening)-2011
Ecosystem
260306
Which of the following statements is correct?
1 Algal Bloom decreases fish mortality
2 Eutrophication refers to increase in domestic sewage and waste water in lakes.
3 Biomagnification refers to increase in concentration of the toxicant at successive trophic levels.
4 Presence of large amount of nutrients in water restricts 'Algal Bloom'.
Explanation:
Biomagnification (also termed as bioamplification) in toxicology terms defined as the increase in concentration of the substance that is toxic to the individual like pesticide at the successive trophic levels in a food chain.
NEET (UG) 07.05.2023
Ecosystem
260307
Lichen is the pioneer vegetation on which succession?
1 Hydrosere
2 Lithosere
3 Psammosere
4 Xerosere
Explanation:
Lichens are considered as pioneer species in primary succession on rocks because they can easily grow on rocks where other plants cannot grow. They produce oxalic acid which induced the weathering of rocks and thus soil is formed.
260328
Which of the following would appear as the pioneer organisms on bare rocks
1 Green algae
2 Lichens
3 Liverworts
4 Mosses
Explanation:
On bare rocks, Lichens are pioneer as they secretes carbonic acid which leads to rock weathering and creation of soil (Pedogenesis). They inrich the soil by trapping water, dust and silt. When lichens die they contributes organic matter to the soil, improving the soil so that other plants can grow there. Thus pioneering life in a barren area. - Green algae- Green algae are an important food Source for aquatic organisms \& others - Mosses - Mosses are used as Antimicrobial.
NEET-2016 Phase-I
Ecosystem
260330
Which one of the following statements is correct for secondary succession?
1 It is similar to primary succession except that it has a relatively fast pace
2 It begins on a bare rock
3 It occurs on deforested site
4 It follows primary succession
Explanation:
Secondary succession occurs when the severity of disturbance is insufficient to remove all the existing vegetation and soil from a site. A classic example of secondary succession occurs in oak and hickory forests cleared by wildfire. - Primary succession occurs in the land where there is no initial vegetation whereas secondary succession occurs in a land that has primary vegetation.
AIPMT (Screening)-2011
Ecosystem
260306
Which of the following statements is correct?
1 Algal Bloom decreases fish mortality
2 Eutrophication refers to increase in domestic sewage and waste water in lakes.
3 Biomagnification refers to increase in concentration of the toxicant at successive trophic levels.
4 Presence of large amount of nutrients in water restricts 'Algal Bloom'.
Explanation:
Biomagnification (also termed as bioamplification) in toxicology terms defined as the increase in concentration of the substance that is toxic to the individual like pesticide at the successive trophic levels in a food chain.
NEET (UG) 07.05.2023
Ecosystem
260307
Lichen is the pioneer vegetation on which succession?
1 Hydrosere
2 Lithosere
3 Psammosere
4 Xerosere
Explanation:
Lichens are considered as pioneer species in primary succession on rocks because they can easily grow on rocks where other plants cannot grow. They produce oxalic acid which induced the weathering of rocks and thus soil is formed.
260328
Which of the following would appear as the pioneer organisms on bare rocks
1 Green algae
2 Lichens
3 Liverworts
4 Mosses
Explanation:
On bare rocks, Lichens are pioneer as they secretes carbonic acid which leads to rock weathering and creation of soil (Pedogenesis). They inrich the soil by trapping water, dust and silt. When lichens die they contributes organic matter to the soil, improving the soil so that other plants can grow there. Thus pioneering life in a barren area. - Green algae- Green algae are an important food Source for aquatic organisms \& others - Mosses - Mosses are used as Antimicrobial.
NEET-2016 Phase-I
Ecosystem
260330
Which one of the following statements is correct for secondary succession?
1 It is similar to primary succession except that it has a relatively fast pace
2 It begins on a bare rock
3 It occurs on deforested site
4 It follows primary succession
Explanation:
Secondary succession occurs when the severity of disturbance is insufficient to remove all the existing vegetation and soil from a site. A classic example of secondary succession occurs in oak and hickory forests cleared by wildfire. - Primary succession occurs in the land where there is no initial vegetation whereas secondary succession occurs in a land that has primary vegetation.
AIPMT (Screening)-2011
Ecosystem
260306
Which of the following statements is correct?
1 Algal Bloom decreases fish mortality
2 Eutrophication refers to increase in domestic sewage and waste water in lakes.
3 Biomagnification refers to increase in concentration of the toxicant at successive trophic levels.
4 Presence of large amount of nutrients in water restricts 'Algal Bloom'.
Explanation:
Biomagnification (also termed as bioamplification) in toxicology terms defined as the increase in concentration of the substance that is toxic to the individual like pesticide at the successive trophic levels in a food chain.
NEET (UG) 07.05.2023
Ecosystem
260307
Lichen is the pioneer vegetation on which succession?
1 Hydrosere
2 Lithosere
3 Psammosere
4 Xerosere
Explanation:
Lichens are considered as pioneer species in primary succession on rocks because they can easily grow on rocks where other plants cannot grow. They produce oxalic acid which induced the weathering of rocks and thus soil is formed.
