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Chapter: Biodiversity, Conservation and Environmental Issues· Biology

Observe the graph and select correct option :[Graph: Species richness (y-axis) plotted against Area (x-axis). Line A is a curve that rises steeply and then levels off (rectangular hyperbola). Line B is a straight line rising from the origin, labelled…

Q.1 (x) Observe the graph and select correct option :

[Graph: Species richness (y-axis) plotted against Area (x-axis). Line A is a curve that rises steeply and then levels off (rectangular hyperbola). Line B is a straight line rising from the origin, labelled ‘log-log scale’.]

A. Line ‘A’ represents S-CA2

B. Line ‘B’ represents log C = log A + Z log S

C. Line A represents S = CAZ

D. Line B represents log S = log Z + C log A

1 answer

Best answer

Answer: (c) Line A represents S = CAZ

Alexander von Humboldt’s species–area relationship: on an ordinary scale species richness rises with area along a rectangular hyperbola (line A), given by S = CAZ, where S = species richness, A = area, C = Y-intercept and Z = slope (regression coefficient). On a log-log scale it becomes the straight line B: log S = log C + Z log A. Options (b) and (d) interchange the terms, so they are wrong.

Doubtly AI · 29 Oct 2026 AI-verified · Nov 2026 Report
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