Question 1
The exoskeleton of all insects is covered by ________.
◦ a protective coating of wax
◦ a barrier of hairs
◦ a lubricating layer of oils
◦ a complex system of scales
◦ a cholesterol-rich layer of membrane
Question 2
Birds have a layer of wax on their ________, making them water repellant.
◦ ears
◦ feathers
◦ skin
◦ legs
◦ eyes