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

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

Question-2 The transition zone between two communities is known as

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

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 Pyramid of energy in ecosystem is

(A) always upright	(B)always inverted
(C)mostly upright	(D)mostly inverted

Question-5 In plant succession, when climax is reached, the net productivity.

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

Question-6 Community is a group of independent and interacting population of

(A) different species	(B)same species
(C)same species	(D)different species in a specific area

Question-7 In a lake, phytoplankton grow in abundance in

(A) littoral zone	(B)limnetic zone
(C)profundal zone	(D)benthic region

Question-8 Primary consumers are

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

Question-9
Lichen is the pioneer vegetation in which succession?

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

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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