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Question-1
The transition zone between two communities is known as
(A)
ecotone
(B)
keystone species
(C)
edge species
(D)
critical link species
Question-2
The aquatic organisms that can actively swim at will against the water current is
(A)
neuston
(B)
plankton
(C)
nekton
(D)
benthos
Question-3
Pyramid that is never inverted
(A)
energy
(B)
mass
(C)
number
(D)
size
Question-4
Lichen is the pioneer vegetation in which succession?
(A)
Hydrosere
(B)
Lithosere
(C)
Psammosere
(D)
Xerosere
Question-5
Which of the following plants develop characters of xerophytes?
(A)
Heliophytes
(B)
Sciophytes
(C)
Hydrophytes
(D)
Halophytes
Question-6
In plant succession, when climax is reached, the net productivity.
(A)
Continues to increase
(B)
becomes halved
(C)
become stable
(D)
becomes zero
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
Energy flow in ecosystem is
(A)
bidirectional
(B)
unidirectional
(C)
all around
(D)
none of these
Question-10
Identify the plant belonging to the reed-swamp stage in hydrarch succession.
(A)
Juncus
(B)
Sagittaria
(C)
Salix
(D)
Trapa
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Plus 1 Biology Science
Tamil Nadu (English Medium)
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