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(i) Define pioneer species
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1
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1063
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November 12, 2016
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Define ecological pyramids and describe with examples,
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1
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1626
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November 12, 2016
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(i) Draw a pyramid of numbers of a situation, where a large
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1
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3326
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November 12, 2016
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Given below is a list of autotrophs and heterotrophs
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1
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1711
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November 12, 2016
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Distinguish between (i) Upright and inverted pyramid
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1
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8726
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November 12, 2016
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The number of trophic levels in an ecosystem are limited. Comment
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1
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8755
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November 12, 2016
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Organisms at a higher trophic level have less energy available
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1
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1829
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November 12, 2016
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The energy flow in the ecosystem follows the second law
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1
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3997
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November 12, 2016
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The diagram shows the flow of energy through an ecosystem
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1
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3738
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November 12, 2016
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Name the type of food chains responsible for the How of larger
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1
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795
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November 12, 2016
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The energy flow in an ecosystem is unidirectional’. Justify the
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1
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3811
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November 12, 2016
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Justify the following statement in terms of ecosystem dynamics
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1
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1105
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November 12, 2016
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The rate of decomposition of detritus is affected by the abiotic
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1
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1534
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November 12, 2016
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Distinguish between following:
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1
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1252
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November 12, 2016
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Which of the following ecosystems will be more productive in terms
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1
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882
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November 12, 2016
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Describe the components of an ecosystem
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1
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991
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November 12, 2016
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Why are oceans least productive?
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1
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2443
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November 12, 2016
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Why is the rate of assimilation of energy at the herbivore
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1
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1119
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November 12, 2016
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Primary productivity varies from ecosystem to ecosystem. Explain
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1
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1362
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November 12, 2016
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How are productivity, gross primary productivity,
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1
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1894
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November 12, 2016
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In nature, leeches attach themselves to the cow grazing in the field
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1
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799
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November 11, 2016
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Why do all the freshwater organisms have contractile vacuoles
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1
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1781
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November 11, 2016
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Why are coral reefs not found in the regions from West Bengal to Andhra Pradesh
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1
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3187
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November 11, 2016
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A group of students visited a botanical garden
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1
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861
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November 11, 2016
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Ramesh visited a National Park on a school trip where he saw tiger eating a deer
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1
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638
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November 11, 2016
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Himani while watching a TV programme based on life in polar region observed that all animals in polar regions possess larger size
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1
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696
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November 11, 2016
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In a biology class, teacher was telling the students that the structures/components
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1
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749
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November 11, 2016
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A population of Paramecium caudatum was grown in a culture medium
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1
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3404
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November 11, 2016
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The following diagrams are the age pyramids of different populations
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1
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1927
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November 11, 2016
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Analysis of age-pyramids for human population
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1
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3264
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November 11, 2016
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