Buy Book. The history of Thailand can be broken into three very general periods - pre-Khmer, Khmer, and post-Khmer. The period called Pre-Khmer, is also called the Dvaravati period. It lasted from about the 6th century until about the 11th or 12th century, when it was overwhelmed by the Khmer civilization of Angkor.
An organelle is a unique part of a cell that has a specific function. The term is a combination of the word organum, which means instrument or engine, and the suffix -elle, which means... Star Gazing
a small intracellular organelle occurring in the cytoplasm of most cells, containing various hydrolytic enzymes and normally involved in the process of localized intracellular digestion.