Question

Match the following:

	Set -I		Set - II
a	Rancher's rule	1	Body size
b	Bergman's rule	2	Wings
c	Allen's rule	3	Vertebra number
c	Jordan's rule	4	Organ size

• A. (a)-(1), (b)-(2), (c)-(4), (d)-(3)
• B. (a)-(3), (b)-(4), (c)-(2), (d)-(1)
• C. (a)-(2), (b)-(1), (c)-(3), (d)-(4)
• D. (a)-(2), (b)-(1), (c)-(4), (d)-(3)

Answer 1

Answer: (D)

(i) Bergman's rule: Warm-blooded animals (birds and mammals) have larger body size in cold climate than in hotter areas.
(ii) Allen's rule: Extremities (legs, ears, tail, mouth) of warm blooded animals become smaller in colder areas as compared to animals of warmer areas.
(iii) Rancher's rule: In a colder climate, birds possess narrow and acuminate wings as compared to broader wings of birds found in warmer areas.
(iv) Jordan's Rule: As the temperature is lowered, some fishes possess a larger size with a larger number of vertebrae.