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
Lichen is the pioneer vegetation in which succession?

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

Question-3 Most diverse organisms of an ecosystem are

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

Question-4 In a lake, phytoplankton grow in abundance in

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

Question-5 The aquatic organisms that can actively swim at will against the water current is

(A) neuston	(B)plankton
(C)nekton	(D)benthos

Question-6 Which of the following plants develop characters of xerophytes?

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

Question-7 Pyramid of energy in ecosystem is

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

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

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

Question-10 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.

Click here to see your answersheet and detailed track records.

Plus 1 Biology Science

Tamil Nadu (English Medium)

Practice in Related Chapters
Cell Biology
Biodiversity
Genetics
Plant Morphology
Plant Physiology
Reproductive Biology
Environmental Biology