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Published on: 31/10/2025
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Questions + Answers key
Take MCQ Science Test

1.
Can you give me a name?
Solve each of the following riddles by writing the name of the organism and its mode of nutrition. One riddle is solved to help you.
(a) I am tall but I cannot move. I am green and can prepare my own food. Tree, autotroph.
(b) I live in water, people keep me in an aquarium and feed me ......................, .......................
(c) I am small and I can fly. I disturb your sleep, bite you and suck your blood which is my food. ......................, .......................
(d) I am white and soft. I grow well in the rainy season. Children pluck me from the ground and admire me. I absorb nutrients from decomposed dead parts of plants and animals in the soil ......................
2.
I am small and I can fly. I disturb your sleep, bite you and suck your blood which is my food ............. , ................
3.
Photosynthesis along with other raw materials like ................
4.
This ......... is used in the process of Photosynthesis.
5.
Leaves have a green pigment called ..............
6.
Cuscuta is a ___________ plant.
7.
All green plants possess ______________ in their leaves.
8.
The openings present on the surface of leaves are protected by cells called _____________
9.
The association where two participating plants mutually benefit each other is called ______________
10.
During photosynthesis, plants take in ___________ and release ____________
11.
The term that is used for the mode of nutrition in yeast, mushroom and bread-mould is :
autotrophic
insectivorous
saprophytic
parasitic
12.
In the absence of which of the following will photosynthesis not occur in leaves?
Guard cells
Chlorophyll
Vacuole
Spacebetween cells
13.
The tissue responsible for the transportation of food in plants:
Xylem
Phloem
Stomata
Root hair
14.
Lichens are the association of :
An autotroph and a saprotroph
An autotroph and a heterotroph
A green plant and non-green plant
All of the above
15.
Insectivorous plant is :
Mushroom
Mango tree
Pitcher plant
Algae
16.
During photosynthesis:
Carbon dioxide is released
Oxygen is released
Nitrogen is released
None of these
17.
Insectivorous plant among the following is
lichen
Cuscuta
pitcher plant
bread mould
18.
Pitcher plant traps insects because it
is a heterotroph
grows in soils which lack in nitrogen
does not have chlorophyll
has a digestive system like human beings
19.
In the process of photosynthesis, which of the following energy conversions occur?
Solar energy is changed into chemical energy
Solar energy is changed into mechanical energy.
Bioenergy is converted into chemical energy
Chemical energy is changed into light energy.
20.
Amarbel is an example of
autotroph
parasite
saprotroph
host
21.
Parasite
22.
Man
23.
Cells
24.
Nitrogen
25.
Rhizobium can fix atmospheric nitrogen into nitrogen compound.
26.
Lichen is a saprophytic plant.
27.
Chlorophyll is present in an animal cell.
28.
The product of photosynthesis is not a protein.
29.
Carbon dioxide is released during photosynthesis
30.
Name the bacteria which converts atmospheric nitrogen into a soluble form.
1.
( )
(b) fish, heterotroph
(c) mosquito, parasite
(d) mushroom, saprophyte
2.
( )
mosquito, parasite
3.
( )
Carbon dioxide
4.
( )
Energy
5.
( )
chlorophyll
6.
( )
parasitic
7.
( )
chlorophyll
8.
( )
guard cells
9.
( )
symbiosis
10.
( )
carbon dioxide, oxygen
11.
(c)
saprophytic
12.
(b)
Chlorophyll
13.
(b)
Phloem
14.
(b)
An autotroph and a heterotroph
15.
(c)
Pitcher plant
16.
(c)
Nitrogen is released
17.
(c)
pitcher plant
18.
(b)
grows in soils which lack in nitrogen
19.
(a)
Solar energy is changed into chemical energy
20.
(b)
parasite
21.
( )
Cuscuta
22.
( )
Heterotrophs
23.
( )
Structural units of bodie.
24.
( )
Bacteria
25.
(a)
26.
(b)
27.
(b)
28.
(a)
29.
(b)
30.
( )
Rhizobium bacteria.
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