71. Choose the correct match.
A
Trapa, Dionaea, Drosera
B
Nepenthes ,Utricularia, Vanda
C
Utricularia, Drosera , Dionaea
D
Dionaea, Trapa, Vanda
Answer :
Utricularia, Drosera , Dionaea
72. Which one of the following population interactions is widely used in medical science for the production of antibiotics?
A
Commensalism
B
Mutualism
C
Amensalism
D
Parasitism
Answer :
Amensalism
73. Deep black soil is productive due to high proportion of
A
sand and zinc
B
gravel and calcium
C
clay and humus
D
silt and earthworm
Answer :
clay and humus
74. Presence of plants arranged into well defined vertical layers depending on their height can be seen best in:
A
Tropical Rain Forest
B
Grassland
C
Temperate Forest
D
Tropical Savannah
Answer :
Tropical Rain Forest
75. Which of the following shows whorled phyllotaxy?
A
Calotropis
B
Mustard
C
China rose
D
Alstonia
Answer :
Alstonia
76. Which of the following is not an attribute of a population?
A
Natality
B
Mortality
C
Species interaction
D
Sex ratio
Answer :
Species interaction
77. Large woody vines are more commonly found in :
A
temperate forest
B
mangroves
C
tropical rainforests
D
alpine forests
Answer :
tropical rainforests
78. Human population growth in India
A
tends to follow a sigmoid curve as in case of many other animal species
B
tends to reach a zero population growth as in case of some animal species
C
can be reduced by permitting natural calamities and enforcing birth control measures
D
can be regulated by following the National programme of family planning
Answer :
can be regulated by following the National programme of family planning
79. Which one of the following is one of the characteristics of a biological community?
A
Stratification
B
Natality
C
Mortality
D
Sex ratio
Answer :
Stratification
80.
The figure given below is a diagrammatic representation of response of organisms to abiotic factors. What do a, b and c represent respectively?
1
2
3
a.
conformer
regulator
partial regulator
b.
regulator
partial regulator
conformer
c.
partial regulator
regulator
conformer
d.
regulator
conformer
partial regulator
A
a
B
b
C
c
D
d
Answer :
d