Question

Choose the correct answer from the alternative given
The fossil record of a direct evidence for common descent because you can
(A) sometimes find common ancestors
(B) trace the ancestry of a particular group.
(C) see that the types of fossil changes over time.
(D) all of these.

Answer 1

Hint:- Fossils are impressions or remains of hard parts of life form found in rocks.study of fossils in different sedimentary layers indicate the geological period in which they existed.

Complete answer:
Various studies show that life forms varied over time and certain life forms are restricted to certain geological time spent new forms of life have arisen than at different times in the history of Earth i.e. evolution has taken place. Generally fossils found in older rocks are of simpler types and found in newer rocks are of complex type.the geological history of earth closely correlated with the biological history of Earth. Evidence of organisms prior to the development of hard body parts such as shells, bones and teeth is especially scarce, but exists in the form of ancient microfossils, as well as impressions of various soft-bodied organisms. The comparative study of the anatomy of different groups of animals shows structural features and structure that are fundamentally similar (homologous), demonstrating that phylogenetic and ancestral relationships with other organisms, mainly when compared with fossils of ancient extinct organisms. Vestigial structures of organisms and comparisons in embryonic development are greatly a contributing factor in anatomical resemblance in concordance with common descent.Therefore,by studying the fossils in the difference sedimentary layers of earth's crust, we can estimate the geological period in which they existed. The study also shows that life forms valued over time as at certain life forms restricted to certain particular geological time spans.Hence, new forms of life have arisen at different times in the history of earth all this is called palaeontological evidence.

From above information the correct answer is (D).

Note:- Study of fossils are known as paleontology. There are 6 types of fossil:-1.unaltered fossils.2.petrified fossils.3.mould fossils.4.cast fossils.5.print fossils.6.coprolites fossils.One of the best example that satisfied the above questions and solutions is Archeopteryx:-it is a missing link between reptile and birds .It was found in the rock of Jurassic period.