👉 Mesozoic is a scientific classification system that categorizes organisms into three main stages, or "mesozoa" (or "mesozoic") in biology. These are the first, second, and third generations of life on Earth.
In this system, the first stage is called the Protostellar Era, which began about 4.5 billion years ago. This was a time when most of the known life forms were still primitive and not yet capable of making their own food or reprodu
mesozoan