A. The conditions under which the organism died and how it was buried.
Reason for Answer: This is because fossils are used to determine the relative age of sedimentary rocks and are used to provide information on past climates, environments, and many more.
Microscopes
Before the development of microscopes, the existence of cellular life was unknown. By examining a piece of cork, Robert Hooke first saw and named cells. Antony van Leeuwenhoek was the first person to see living cells.
This is called active transport. The proteins use ATP to transport stuff in and out of the cell.
Answer:Autoimmune hemolytic anemia. Known as AIHA, this condition occurs when the immune system creates antibodies that destroy red blood cells. Because red blood cells carry oxygen to the body's tissues, AIHA can result in a reduced amount of oxygen in the body.