All the plants require nitrogen for
Reproduction
Photosynthesis
Transpiration
Growth
Glass panes usually appear hazy because
Water vapour settling on the tiny dust particles
Of chemical reactions
It is property of all transparent substances
They are old
Which of the following plays a very important role in the oxygen cycle ?
Birds
Animals
Plants
Soil
Pick the odd one out.
Fish
Insects
In seas and oceans, a large number of plants, fishes and other animals live without air. How is this possible ?
The plants and animals come to the surface in regular intervals.
Aquatic plants and animals do not need air to survive.
Water contains dissolved gases which enable them to live.
They survive because of the interdependence of plants and animals.
The humidity of a place
Lies between 10% to 20%
Is always more than 50%
Is always less than 80%
Varies from time to time
Can we see the air?
Yes
No
Both a&b
None of these
All living things need air for___________.
Excretion
Breathing
Circulation
Choose the correct answer
We experience the presence of air when an electrical _________rotates.
light
fridge
washing machine
fan
Air is one of the main components which help in the _______________of seeds.
germination
reproduction
pollination
growth
