In Hydrarch succession, the order of plant groups is-

1. Rooted-submerged plants, Phytoplanktons, rooted-floating angiosperms, reedswamp, scrub marsh-meadow,

2. Phytoplanktons, rooted-submerged plants, rooted-floating angiosperms, reedswamp, marsh-meadow, scrub

3. Phytoplanktons, rooted-submerged plants, rooted-floating angiosperms, scrub, reedswamp, marsh-meadow,

4. Phytoplanktons, rooted-floating angiosperms, rooted-submerged plants, reedswamp, marsh-meadow, scrub

Subtopic:  Ecological Succession (OLD NCERT) |
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In hydrarch succession, after the climax community is established, water body is converted into-

1. Pond

2. Land

3. Swamp

4. None of the above

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What would be the climax of a hydrarch succession?

1. Grassland

2. Marsh-meadow

3. Forest

4. Reed-swamp

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Xerarch and Hydrarch succession leads to respective climax communities as follows-

1. Xeric and hydric

2. Hydric and xeric

3. Mesic and mesic

4. Xeric and mesic

Subtopic:  Ecological Succession (OLD NCERT) |
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Identify the stages of hydrarch succession.

                      A                                               B
 

1. Reed-swamp stage Marsh-meadow stage

2. Submerged plant stage Scrub stage

3. Reed-swamp stage Submerged plant stage

4. Scrub stage Marsh-meadow stage

Subtopic:  Ecological Succession (OLD NCERT) |
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The amount of nutrients, such as carbon, nitrogen, phosphorus, calcium, etc. present in the soil at any given time, is referred to as the-

1. Nutrient status of a soil

2. Standing state

3. Standing crop

4. Mineral state.

Subtopic:  Mineral Cycling & Ecosystem Services (OLD NCERT) |
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Standing state does not vary in-

1. Different kinds of ecosystems

2. A seasonal basis

3. Different kinds of soil

4. Same kind of ecosystem.

Subtopic:  Mineral Cycling & Ecosystem Services (OLD NCERT) |
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Why does nutrients are never lost from the ecosystem?

1. Because they get transferred among various trophic levels.

2. Because they get recycled

3. Because they never get exhausted

4. Because they are required in very low quantity.

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What do we call to the the movement of nutrient elements through the various components of
an ecosystem ?

1. Recycling

2. nutrient cycling

3. Biogeochemical cycle

4. Both 2 and 3.

Subtopic:  Mineral Cycling & Ecosystem Services (OLD NCERT) |
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Where do we find reservoir for gaseous type nutrient cycling?

1. Land

2. Sea

3. Earth’s crust

4. Atmosphere

Subtopic:  Mineral Cycling & Ecosystem Services (OLD NCERT) |
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