Saturated fatty acids are 'saturated' with hydrogen meaning they contain the maximum number of hydrogen. This causes them to be straight on the molecular level, allowing them to be packed close together other saturated fatty acids. Thus, they tend to be solids at room temperature. Examples of saturated fats are butter and the solid white fat you see on raw meat.
Answer:
carbon source Earth's crust
three domains , archae- 1st appeared, prokaria- not closed by nucleus and eukaria closed by nucleus
cyanobacteria
it is one of the earliest organisms
