Vertebrata
Vertebrata is a group that contains various organisms which possess vertebrae (backbones). Animals that belong to the group are called vertebrates, and they include mammals, birds, fish, amphibians, and reptiles. The backbones in the animals extends from the head to the tail, and it encloses and protects the main nerve cord. The body of vertebrates is divided into trunk, and tail regions. They also possess a unique tube shaped brain, a distinct head, and three pairs of sense organs.
14C (carbon-14) can be used to date a 20,000 year old skeleton
Answer:
I believe the correct answer is homeostasis. When your blood sugar is too high, your pancreas secretes insulin. When your blood sugar is too low, your pancreas secretes glucagon to regulate it.
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