11.
A pair of insectivorous plants is
A
Drosera and Rafflesia
B
Nepenthes and Bladderwort
C
Dionaea and Viscum
D
Venus fly trap and Rafflesia
Answer :
Nepenthes and Bladderwort
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12.
Cause of mimicry is
A
concealment
B
attack (offence)
C
protection (defence)
D
both (B) and (C)
Answer :
concealment
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13.
Two plants can be conclusively said to belong to the same species if they
A
have more than 90 per cent similar genes
B
look similar and possess identical secondary metabolites
C
have same number of chromosomes
D
can reproduce freely with each other and form seeds
Answer :
can reproduce freely with each other and form seeds
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14.
What is the most important factor for the success of animal population?
A
Natality
B
Unlimited food
C
Adaptability
D
Inter-species activity
Answer :
Adaptability
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15.
In India, human population is heavily weighed towards the younger age groups as a result of
A
short life span of many individuals and low birth rate
B
long life span of many individuals and low birth rate
C
short life span of many individuals and high birth rate
D
long life span of many individuals and high birth rate
Answer :
short life span of many individuals and high birth rate
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16.
The semilog of per minute growing bacteria is plotted against time. What will be the shape of graph?
A
Sigmoid
B
Hyperbolic
C
Ascending straight line
D
Descending straight line
Answer :
Ascending straight line
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17.
Which part of the world has a high density of organisms?
A
Grasslands
B
Savannahs
C
Deciduous forests
D
Tropical rain forests
Answer :
Tropical rain forests
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18.
Animals that can tolerate a narrow range of salinity are
A
stenohaline
B
euryhaline
C
anadromous
D
catadromous
Answer :
stenohaline
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19.
Which of the following pairs is correctly matched?
A
uricotelism - aquatic habitat
B
parasitism - intra-specific relationship
C
excessive perspiration - xeric adaptation
D
stream lined body - aquatic adaptation
Answer :
stream lined body - aquatic adaptation
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20.
In a population unrestricted reproductive capacity is called as
A
biotic potential
B
fertility
C
carrying capacity
D
birth rate
Answer :
biotic potential
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