Pick three of these examples: chameleon, ducks, jellyfish, snakes, dandelions, orchids, and acorns. Explain the major demographic features of those 3 populations. Solution Chameleons are reptiles which are adapted to water scarcity conditions. They are terrestrial. Need less water for survival. Can tolerate high temperatures. Ducks are aves which need ample amount of water. they feed on fish and insects. they cannot tolerate high temperatures.need vegetation. Snakes are reptiles which can survive in water scrcity. feed on othe animals.may be terrstrial or aquatic.can tolerate high temperatures..