The earth is surrounded by a layer of air called
Stratosphere
Ionosphere
Biosphere
Atmosphere
Fish take in:
Dissolved carbondioxide present in water
Dissolved oxygen present in water
Dissolved nitrogen present in water
The gas exhaled is.
Nitrogen
Carbon dioxide
Oxygen
Helium
Children need more of
Carbohydrates
Fats
Proteins
None
The front limbs and the back limbs are respectively called as:
Fore limbs
Hind limbs only
Fore limbs and hind limbs
The air passes into the lungs through the .
Air tubes
Air holes
Wind pipe
What are present for chewing in herbivores?
Molars
Premolars
Carvines
Humans have posture
Curved
Bent
Upright
bent
Deer like animals which live in the artic regions are called
Wilde beests
Caribou
Monerch butterfly
Artictern
Which fins help fishes to move forward?
Unpaired fins
Tail fins
Paired fins
Side fins