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Biology · 2023 · 4 marks
CBSE 2023 · Region 1 · Set 1 · Q30
Study the diagrammatic representation given below of the Earth with regions marked 'A' and 'B' respectively. Answer the questions that follow. (a)…
Study the diagrammatic representation given below of the Earth with regions marked 'A' and 'B' respectively. Answer the questions that follow.
(a)
Write the observations made regarding the species diversity when moving from region 'A' to region 'B'. Give two reasons also.
(b)
Stating the reason, mention the approximate number of bird species recorded in India.
OR
(b)
Name the region in the world that records the greatest biodiversity and mention why.
Marking-scheme solution
(a)
Species diversity decreases as we move from region A to region B.
Reasons : less Constant mean annual temperature, lesser habitable land area, availability of lesser solar energy, lesser productivity.
(b)
More the $\displaystyle 1200$ species of birds, Indian land mass being largely in the tropical latitudes.
OR
(b)
Amazonian rainforest (in South America), mainly being in tropical region.
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CBSE Class 12 Biology past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.