The pyramid of biomass in the sea is generally inverted because:

1. the biomass of fish far exceeds that of phytoplankton at any given time
2. the major primary production to the sea is actually contributed by the terrestrial ecosystems
3. the flow of energy level does not follow the laws of thermodynamics in the sea
4. It is not true. The pyramid of biomass can never be inverted in any ecosystem

Subtopic:  Ecological Pyramids |
 88%
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Which of the following pyramids can never be inverted in any ecosystem?
1. Pyramid of numbers
2. Pyramid of biomass
3. Pyramid of energy
4. All ecological pyramids can be inverted

Subtopic:  Ecological Pyramids |
 92%
From NCERT
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In an ecological pyramid, the saprotrophs:
1. are primary producers
2. can be at any trophic level
3. are not given any place
4. are kept with apex predators

Subtopic:  Ecological Pyramids |
 78%
From NCERT
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Ecological succession is:
1. gradual and predictable
2. gradual and unpredictable
3. sudden and predictable
4. sudden and unpredictable

Subtopic:  Ecological Succession (OLD NCERT) |
 67%
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The entire sequence of communities that successively change in a given area are called:
1. Taxa
2. Seres
3. Pioneers
4. Climax

Subtopic:  Ecological Succession (OLD NCERT) |
 84%
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Ecological succession has paralleled:
1. Glaciations
2. Mass extinctions
3. Genetic drifts
4. Evolution

Subtopic:  Ecological Succession (OLD NCERT) |
 82%
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In which of the following instances would an ecological succession regarded as secondary?
1. Newly cooled lava
2. Bare rock
3. Newly created pond
4. Abandoned farmland

Subtopic:  Ecological Succession (OLD NCERT) |
 84%
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Identify the correct statements regarding ecological succession:

I:  Usually, secondary succession is faster than primary succession.
II:  Ecological succession involves a change over time in vegetation only.
III:  Natural or human disturbance can convert a particular seral stage of succession to an earlier stage.

1. Only I and II
2. Only I and III
3. Only II and III
4. I, II and III

Subtopic:  Ecological Succession (OLD NCERT) |
 74%
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Ecological succession leads to mesic conditions in: 

I:  Hydrarch succession
II:  Xerarch succession

1. Both I and II
2. Only I
3. Only II
4. Neither I nor II

Subtopic:  Ecological Succession (OLD NCERT) |
 92%
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In primary succession in water, the pioneers are normally:
1. Lichens
2. Mosses
3. Phytoplankton
4. Submerged rooted plants

Subtopic:  Ecological Succession (OLD NCERT) |
 74%
From NCERT
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