AP BIOLOGY

Detailed explanation-1: -Why don’t we have a complete fossil record of all life that’s ever lived? Fossil formation requires a rare mix of physical and biological conditions. Fossils must be exposed at Earth’s surface to have a chance of being found. Fossils can be destroyed when rocks erode, melt, or change composition.

Detailed explanation-2: -For many reasons, the fossil record is not complete. Most organisms decomposed or were eaten by scavengers after death. Many species lacked hard parts, which are much more likely to fossilize. Some rocks and the fossils they contained have eroded and disappeared.

Detailed explanation-3: -what are two reasons that the fossil record is not complete? most living things do not form into fossils when they die and they haven’t been look for in many areas of the world. what is one example of a transitional fossil that has been found?

Detailed explanation-4: -The fossil record is incomplete. Of the small proportion of organisms preserved as fossils, only a tiny fraction have been recovered and studied by paleontologists. In some cases the succession of forms over time has been reconstructed in detail.

Detailed explanation-5: -Fossil’s sign and bodies remain preserved in sedimentary rocks. When sedimentary rocks are deep buried in the earth due to pressure above and temperature it turns into metamorphic rock and fossils destroy . Due to this rock cycle, fossil record has been lost.