Answer:
Vertebrates represents animals with backbones.
No, no energy was lost, it was only transferred. Due to the Law of Conservation of Energy, energy cannot be created or destroyed.
Answer:
At the close of the nineteenth century, Thomas Edison was working on perfecting his system of direct current (DC) for electric power distribution. Meanwhile, the inventor and physicist Nikola Tesla was discovering the benefits of his competing alternating current (AC) system.
Explanation: