Q.16 Individual successions are known as
A) Primary successions C) Seres
B) Secondary successions D) Xeroses
Q.17 Which one of the following is the ultimate distributional unit within which a species is restrained
by the limitations of its physical structure and physiology?
A) Niche B) Biome
C) Ecosystem D) Habitat
Q.18 All herbivores belong to which trophic level in the food chain?
A) T1 C) T3
B) T2 D) T4
Q.20 The relationship in which one organism gets benefit and the other is not affected is called
A) Mutualism C) Predation
B) Commensalism D) Parasitism