Case Study Questions for Class 12 Biology Chapter 15 Biodiversity and Conservation

Case Study Questions for Class 12 Biology Chapter 15 Biodiversity and Conservation

Question 1:

Within a region, species richness increases with increasing explored area, but only upto a limit. The given graph explains this relationship.

(i) What does the given figure show?
(a) Rivet-popper hypothesis
(b) Species-area relationship
(c) Proportionate number of species of major taxa
(d) a-ecological diversity

(ii) Equation for relationship (A) between species richness and area is
(a) log S = log C + Z log A
(b) log C = log S + Z log A
(c) Z log A = log S + log C
(d) log S = log C + log A.

(iii) What is the value of slope of line or regression coefficient Z for frugivorous birds?
(a) 0.1-0.2
(b) 1.15
(c) 0.01-0.1
(d) 0.6-1.2

(iv) The shape of curve for relationship between species richness and areas for a wide variety of taxa is
(a) straight line
(b) parabola
(c) rectangular hyperbola
(d) bell shaped.

(v) Who gave this concept of increase in species richness with increasing area?
(a) Humboldt
(b) Odum
(c) Edward Wilson
(d) Paul Ehrlich

Answer

Answer: (i) (b)
(ii) (a) On a logarithmic scale, the relationship between species richness and area is a straight line.
It is described by the equation log S = log C + z log A
(iii) (b) The regression coefficient Z have a value of 1.15 for frugivorous birds and mammals of tropical forests of different continents.
(iv) (c)
(v) (a) While exploring the wilderness of South American jungles, Alexander von Humboldt found that within a region, the species richness increased with increasing area but upto a certain limit.