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 Littotal zone is located along the

(A) high mountains	(B)sea
(C)rivers	(D)desert

Question-2 In a grazing food chain carnivores may also the referred to as

(A) primary producers	(B)secondary producers
(C)primary consuemrs	(D)secondary consumers

Question-3 Primary consumers are

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

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 Identify the plant belonging to the reed-swamp stage in hydrarch succession.

(A) Juncus	(B)Sagittaria
(C)Salix	(D)Trapa

Question-6 Most diverse organisms of an ecosystem are

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

Question-7
Lichen is the pioneer vegetation in which succession?

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

Question-8 Which of the following plants develop characters of xerophytes?

(A) Heliophytes	(B)Sciophytes
(C)Hydrophytes	(D)Halophytes

Question-9 Energy flow in ecosystem is

(A) bidirectional	(B)unidirectional
(C)all around	(D)none of these

Question-10 The transition zone between two communities is known as

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

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Plus 1 Biology Science

Tamil Nadu (English Medium)

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