Question

Describe the structure of fossils in support of organic evolution.

Answer 1

Hint: Fossils area unit the preserved remains, or traces of remains, of ancient organisms. Fossils don't seem to be the remains of the organism itself. They’re rocks. The fossil will maintain by protective a complete organism or simply a part of one. Fossil is the primary supply of data regarding the history of life on Earth.

Complete answer:
Only a little fraction of ancient organisms’ area units are preserved as fossils, and frequently solely organisms that have a solid and resistant skeleton area unit without delay preserved.
Most major teams of invertebrate animals have a chalky skeleton or shell (e.g., corals, mollusks, brachiopods, bryozoans). Alternative forms have shells of phosphate (which additionally happens within the bones of vertebrates), or silica.
A bone or a shell that's buried quickly once deposition might retain these organic tissues, though' they become petrified over time. The unchanged arduous components, like the shells of clams or brachiopods, are an area unit usually found in matter rocks, a number of nice ages.
The fossils typically accommodate a portion of organisms that was partly mineralized throughout life like the bones and teeth of vertebrates or the polyose or chalky exoskeletons of invertebrates.
 But alternative fossils contain traces of skin, feathers or maybe soft tissues in them.
Then the bones and shells harden to make rocks.
Direct evidence for the history of evolution is given by fossils. It helps the scientists to correlate the organisms from the past.

Note: Organic evolution is the theory that generates the concept that more modern varieties of plants and animals have their origin in alternative pre-existing forms and also the distinct variations between ancestors and descendants is due to modification seen in subsequent generations. There are three varieties of bias the fossil records suffer through: temporal, geographic and classification bias. Newer fossils area units are easier to seek out than the previous ones because the geomorphology causes loss or displacement of fossils.