Qn: Camel can drink large amount of water at a time and it has capacity to stay long without water in hot dessert. Is this structural adaptation or behavioral?
Ans: Its mostly structural rather than behavioural.
The Kangaroo Rat is an interesting animal that can illustrate both structural and behavioural adaptations.
Structural: they have the ability to convert the dry seeds they eat into water, and they neither sweat nor pant like other animals to keep cool.
Behavioural: They spend their days in their burrows where the air is moist and humid. Kangaroo rats seem to have two major periods of activity: one around 9 pm and the other about 3 am when there is the most moisture in the air!