Description : The mesozoic era of earth is called the :
Last Answer : The mesozoic era of earth is called the : A. Age of amphibians B. Age of armoured fishes C. Age of primitive man D. Age of ruling reptiles
Description : This period in earth history is the earliest subdivision of the Paleozoic Era. Many of the oldest known invertebrate fossils occur in this period, the principal types being trilobites, chitinous brachiopods, and primitive graptolites. Name this period.
Last Answer : ANSWER: CAMBRIAN PERIOD
Description : In which caliph era was the first hadith to be recorded in book form ?
Last Answer : In the time of Caliph Omar bin Abdul Aziz (RA).