Dragonflies are flying insects. In the summer, dragonflies can be seen perched on tree branches in an obelisk pose (i.e., a handstand position with the tip of their abdomen pointing upward). In 3–5 sentences, describe how dragonflies might control their body temperature and give reasons for why they might perch in this pose.(4 points)
Dragonflies are ectothermic, meaning they rely on external sources of heat to regulate their body temperature. By perching in an obelisk pose, with their abdomen pointing upwards, dragonflies expose less surface area to the sun. This reduces their overall heat gain and prevents overheating. The upright position also helps to maximize air exposure, allowing for efficient exchange of body heat with the surrounding environment. Additionally, this posture may also serve as a defensive mechanism by making them appear larger and more intimidating to potential predators.
