Ecosystem And Biosphere

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136 Ginger is a modified

A
roof
B
leaf
C
tendril
D
stem

137 The arrangement of leaves on an axis or stem is called

A
Phyllotaxy
B
Vernation
C
Venation
D
Phytotaxy

138 Which of these fruits develop from an inflorescence ?

A
Apple
B
Guava
C
Pineapple
D
Grape

139 The form of carbohydrate which is synthesised in plants is :

A
Starch
B
Glucose
C
Fructose
D
Cellulose

140 Which of the following is a nitrogen-fixing bacteria?

A
Salmonella
B
Rhizobium
C
E.coli
D
Pseudomonas

141 Biotic component of the environment does not include-

A
Soil system
B
Animal system
C
Micro-organism system
D
Plant system

142 Bacterial diseases are found in :

A
plants
B
animals
C
humans
D
All of the above

143 Oxygen in our blood is transported by a protein named

A
haemoglobin
B
keratin
C
collagen
D
myoglobin

144 In plants, chloroplasts are necessary for

A
Photosynthesis
B
Storage
C
Cell movement
D
Respiration

145 In plants cells,which structure provides a definite shape to the cell and makes it right?

A
Cell membrane
B
Chitin
C
Epidermis
D
Cell wall

146 A plant with fibrous root system is :

A
Wheat
B
Pea
C
Mustard
D
Bean

147 In Angiosperms, plant embryos in seed have structures called …….

A
Spore
B
Buds
C
Sprout
D
Cotyledon

148 Metabolism is referred to as

A
synthesis of biomolecules
B
breaking-down of biomolecules
C
synthesis and breaking down of biomolecules
D
recycling of biomolecules

149 Alfalfa is the name of a kind of :

A
Forest
B
Crop
C
Grass
D
None of these

150 Plants get water through the roots because of:

A
elasticity
B
capillarity
C
viscosity
D
photosynthesis