Fossils.
fossils
fossil
The remains of once living organism are known as fossils.
All fossils are found in sedimentary rocks. Some sedimentary rocks are made of nothing but fossils such as chalk. A creature ( microscopic or larger) skeleton is deposited after death usually on the ocean floor. Sediments cover it, and over time turns into a fossil.
A rock formed from the remains of living things is called a sedimentary rock. This type of rock is formed through a process known as lithification, where sediments such as dead plants or animals accumulate and become compacted over time. Examples include limestone, coal, and chalk.
sometimes fossils
Igneous rock forms from magma or lava. It would be unlikely an organism's remains would survive partially or intact upon exposure to such conditions.
limestone-sedimentary
Because when the lava killed the animals, their remains stayed in the lava and dried to become sedimentary rock.
Fossils are found nearly exclusively in sedimentary rock because these rocks form from the accumulation of sediment, which can include organic materials and remains of living organisms. The conditions in sedimentary environments, such as riverbeds, lakes, and ocean floors, facilitate the burial and preservation of these remains, protecting them from decay and destruction. In contrast, igneous and metamorphic rocks are formed under conditions that typically destroy fossils due to high heat and pressure. Thus, sedimentary rocks provide the ideal setting for fossilization.
In the blood.
Their are four types of organic compound found in a living organism: proteins, carbohydrates, lipids, and nucleic acids..