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1
Ozone layer presents between which of the following two layers of oxygen ?
Troposphere and Stratosphere
Stratosphere and mesosphere
Mesosphere and Thermosphere
Thermosphere and Exosphere
2
The gas which is present in highest amount in the atmosphere is ________________.
Nitrogen
Oxygen
Argon
Helium
3
The amount of percent of Oxygen is present in the Air is ______________
20
21
25
30
4
Plants have ______________ pores called stomata found on the underside of leaf.
Tiny
Large
Circular
Rectangular
5
Plant produce oxygen during _____________ and utilize oxygen during _______________.
Photosynthesis, Photosynthesis
Photosynthesis, Respiration
Respiration, Photosynthesis
Respiration, Respiration
6
Which of the following plants have stomata on its upper surface ?
Sunflower
Rose
Mustard
Water lily
7
Air moves from a region of ____________ pressure to one of _____________ pressure.
Lower, Higher
Lower, Normal
Higher, Normal
Higher, Lower
8
Which of the following is correct :
(a) Air is required for respiration.
(b) Air helps in the dispersal of seeds.
Only (a) is correct.
Only (b) is correct.
Both (a) and (b) are correct.
None of these.
9
All living things breathe in ____________________ .
Carbon dioxide
None of these .
10
Which of the following are correct :
(a) Troposphere, stratosphere, mesosphere, thermosphere and exosphere are the layers of atmosphere.
(b) An atmosphere is a layer or a set of layers of gases surrounding a planet or other material body.
11
Select the one that has an adverse effect on ozone layer.
Chlorofluorocarbons
Soil
Dust particles
12
The holes in the ozonosphere is due to the attack of a pollutant that is released from __________________
Automobiles
Air conditioners
Industries
Volcanic eruptions
13
(a) Earthworm respirate through skin.
(b) Fish respirate through Gills.
None of these
14
Which of the following statement is not correct about the respiration in living things?
When living things breathe they take air which contains oxygen.
Plants and Animals that live in water get oxygen from the air dissolved in water.
The process of respiration uses carbon dioxide and produce oxygen and water vapours along with energy.
Respiration is a slow process and takes place at body temperature.
15
Ozone is formed in which zone of atmosphere ?
Mesosphere
Stratosphere
Trophosphere
Ionosphere