The Precambrian time refers to the time 4.5 billion to 542 millions year ago. This period is characterized by having reduced atmosphere and included reduced compounds. Scientists believed that atmosphere at that time was devoid of free oxygen and CO2 was present in excess. Before the complex life evolved on the Earth, the Precambrian Earth's ocean contained dissolved carbon dioxide.
Answer:
Scientists repeats the steps in cycle mode and in order to be sure about the results he/she chosen.
Answer:
it is unclean
Explanation:
fish that have non-shedding, non-overlapping, diamond-patterned, or imbedded scales should be considered unclean.
Answer:
The grid method is best used in large crime scenes such as fields or woods.
Explanation:
Several searchers, or a line of them, move alongside each other from one end of the area to be searched to the other.
