Ecosystem And Biosphere

Only available for you

121 Which among the following elements increases the absorption of water and calcium in plants ?

A
Manganese
B
Boron
C
Copper
D
Molybdenum

122 The edible part of an onion is :

A
Modified root
B
Aerial flower
C
Aerial stem
D
Fleshy leaves

123 The number of chloroplasts in a cell of Spirogyra is :

A
1-4
B
1-8
C
1-14
D
2-8

124 They protect plants from water loss and abrasive damage.

A
Leaves
B
Waxes
C
Minerals
D
None of the above

125 Oxygen liberated during photosynthesis is coming from :

A
Carbon dioxide
B
Water
C
Bresk down of chlorophy II
D
Atmosphere

126 Where is the Botanical Survey of India headquartered ?

A
Lucknow
B
Darjeeling
C
Kolkata
D
Oottaccamund

127 What kind of soil is treated with gypsum to make it suitable for cropping?

A
Alkaline
B
Acidic
C
Water-logged
D
Soil with excessive clay content

128 Maximum photosynthetic activity occurs in :

A
blue and red region of light
B
green and yellow region of light
C
blue and orange region of light
D
violet and orange region of light

129 Fruits of this plant are found underground :

A
Potato
B
Carrot
C
Groundnut
D
Onion

130 The age of trees is determined by its :

A
girth
B
height
C
growth rings
D
general appearance

131 Which of the following is NOT one of the important steps in processing tea leaves?

A
Rolling
B
Drying
C
Fermenting
D
Withering

132 Which wood will become useless soon after exposing in the open air ?

A
Soft wood
B
Fibrous wood
C
Wet wood
D
Hard wood

133 The cross-section of a stem of tree has fifty rings, what is the age of the tree ?

A
50 months
B
5 years
C
25 years
D
50 years

134 Animals do not have enzyme systems which enable them to make use of the energy from :

A
fat
B
water
C
protein
D
carbohydrate

135 The pollen grains of flowers pollinated by insects are :

A
smooth and dry
B
rough and sticky
C
rough and dry
D
large and showy