Why isn't fossil record a complete record of life on earth?

... that any organism specie will turn into fossil. Fossil's sign and bodies remain preserved in sedimentary rocks. When sedimentary rocks are deep buried in the earth due to pressure above and temperature it turns into metamorphic rock and fossils destroy .Due to this rock cycle , fossil record has been lost. read more

Fossils record isn't completed because of the following reasons Explanation: Fossils form only when organism dies and suddenly buried in low oxygen environment. unfortunately, this scenario is rarely found .In general there are 5% chances that any organism specie will turn into fossil. read more