What type of human population is represented by the following age pyramid ?

Large Woody Vines are more commonly found in

Which one of the following is categorised as a parasite in true sense ?

Consider the following four conditions (a – d) and select the correct pair of them as adaptation to environment in desert lizards.
The conditions :
(a) burrowing in soil to escape high temperature
(b) losing heat rapidly from the body during high temperature
(c) bask in sun when temperature is low
(d) insulating body due to thick fatty dermis