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 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-2 Pyramid of energy in ecosystem is

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

Question-3
Lichen is the pioneer vegetation in which succession?

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

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 When the two ecosystem overlap each other, the areas is called

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

Question-6 Most diverse organisms of an ecosystem are

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

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

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

Question-8 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-9 Identify the plant belonging to the reed-swamp stage in hydrarch succession.

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

Question-10 Pyramid that is never inverted

(A) energy	(B)mass
(C)number	(D)size

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Plus 1 Biology Science

Tamil Nadu (English Medium)

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