Tamil Nadu (English Medium) Plus 1 Biology Science Study Materials, Online Learning, Question Papers, Classnotes, Practice Test, MCQ | Smartindia Educational Program : www.smartindia.net.in

Question-1 The sequence of communities showing a gradual change in composition is called

(A) continuum	(B)bio indicator
(C)succession	(D)pyramid of number

Question-2 When the two ecosystem overlap each other, the areas is called

(A) habitat	(B)niche
(C)ecotone	(D)ecotype

Question-3 Which of the following pyramid is always upright and can never be inverted?

(A) Pyramid of biomass	(B)Pyramid of number
(C)Pyramid of energy	(D)Both a and c

Question-4 In plant succession, when climax is reached, the net productivity.

(A) Continues to increase	(B)becomes halved
(C)become stable	(D)becomes zero

Question-5 Niche is defined as the

(A) position of species in a community in relation to other species.	(B)place where organism lives
(C)place where organism lives and its functional role	(D)place where population perform their duties.

Question-6 Actively moving organisms in aquatic ecosystem are

(A) nekton	(B)benthos
(C)viruses	(D)none of these

Question-7 Primary consumers are

(A) carnivores	(B)herbivores
(C)decomposers	(D)omnivores

Question-8
Lichen is the pioneer vegetation in which succession?

(A) Hydrosere	(B) Lithosere
(C) Psammosere	(D) Xerosere

Question-9 The transition zone between two communities is known as

(A) ecotone	(B)keystone species
(C)edge species	(D)critical link species

Question-10 Most diverse organisms of an ecosystem are

(A) producers	(B)consumers
(C)carnivores	(D)decomposers

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Plus 1 Biology Science

Tamil Nadu (English Medium)

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