Which one of the following are used to protect crops from pests and insects?
Water
Minerals
Glucose
Pesticides
Which one of the following process in plants is responsible for the release of oxygen?
Respiration
Digestion
Photosynthesis
Reproduction
The feet of ducks are webbed. This adaptation helps them to
hold branches tightly
swim faster in water
float on water
eat insects and grab things
The adaptation mechanism of chameleon is to
hibernate in winter
change colours to suit its surroundings
develop scaly skin on its body to maintain moisture
migrate to long distances in winter
What might happen if the plants stop releasing oxygen into the atmosphere?
Plants will be more healthier
Number of plants will increase
Number of animals will increase
Animals will die from the lack of oxygen
The air we breathe out contains more
oxygen
carbon dioxide
water
chlorophyll
Which one of the following process is responsible for the release of carbon dioxide by the animals?
Our national bird is
crow
peacock
sparrow
parrot
Kanha national park is situated in
Uttar pradesh
Andhra Pradesh
Madhya Pradesh
Himachal Pradesh
By observing the independence of plants and animals and circulation of oxygen and carbon dioxide we can say that
some day all the oxygen will be used up by the animals
some day all the carbon dioxide will be used up by the plants
the amount of oxygen is increasing and that of carbon dioxide is decreasing in the atmosphere
the level of oxygen and carbon dioxide in the atmosphere is kept constant