Answer:
If the scientist is correct and the new species is a reptile, it would likely maintain homeostasis through several mechanisms.
Firstly, reptiles are cold-blooded animals, meaning that their body temperature is regulated by the environment, this is known as thermoregulation, they would maintain homeostasis by basking in the sun to raise their body temperature when it's too cold and seeking shade when it's too hot.
Secondly, reptiles also have a specialized respiratory system that allows them to extract oxygen efficiently from the air. They would maintain homeostasis by adjusting their breathing rate to match their level of activity.
Thirdly, reptiles have a specialized renal system that allows them to regulate the water and electrolyte balance in their bodies. This species would maintain homeostasis by staying close to the lake where it can drink and maintain the electrolyte balance.
Lastly, the new species would maintain homeostasis by using its behavior to avoid predators and other threats, such as inflating itself when scared, burrowing in the ground, and communicating through sounds.
Step-by-step explanation: