Most of the fossils we find were buried in flood sediments. Thus, rapid burial (preferably in an anoxic environment) aids in fossilization. Most of the fossils that ever existed were subsequently eroded away and obliterated by the same river systems where they were created. A second requirement, therefore, tends to be climate change, or some environmental disturbance (such as an earthquake or volcanic eruption) that changes the course of a river system, or gently uplifts a mountain range.
Some fossils, especially insects, are encased in amber. These are exquisitely well preserved, but it requires millenia for tree sap to harden into stone.
Second, for us to find the fossils, they must again erode close to the surface where fossil hunters can stumble across them and recognize them for what they are. Many fossils have been destroyed by people who did not recognize these strange things eroding out of the earth had any value.
There are three types of fossils. There are impressions, such as footprints or body parts molded in clay which subsequently hardened into stone. There is infilling, where calcium carbonate or some other substance fills in the spaces left by decaying organic matter. Both of these types of fossils can be created quite quickly. The last, mineralization, is the replacement of organic material with inorganic material. This replacement occurs over many thousands of years. It is an extremely slow process.
all three prerequisites
Organisms can cause changes in their environment to ensure survival in various ways. This happens through the various processes that cause organisms in different trophic levels to interact from producers to consumers and to decomposers.
Most individual cells within multi-cellular organisms have a finite lifetime. As cells wear out or die, they must be replaced by new ones. Cells in simpler organisms will reproduce by division, leaving one older cell and one newer cell.
In order to be fossilized, an organism must be suitable for the process. Bones and teeth are perfect for fossilization and the organism must be buried quickly to be preserved. The soil must be low in acidity and have high concentrations of minerals.
An organism that eats other organisms is called a consumer.
The functional prerequisites that a society must satisfy if it is to survive include the following:AdaptionGoal AttainmentIntegrationPattern Maintenance
It must die.
There are prerequisites you must acquire before you can get your drivers license.
It depends on the organisms and their habitats. Most of the time, yes, organisms must compete, as this space also contains items necessary for survival such as food and water.
It depends on the organism. Most likely 6.5-7.5
all three prerequisites
all three prerequisites
all three prerequisites
Some schools will teach you the general stuff concurrently, and require no prerequisites, while other schools will ask that you've taken certain general college courses first.
All organisms must reproduce.
Consumers ^_^
Organisms that belong to the same class must also belong to the same phylum. Classes are subdivisions of phyla in the classification hierarchy of organisms.