For example, dead animals and plants can be preserved in amber , peat bogs, tar pits, or in ice. preserved traces of organisms, such as footprints, burrows and rootlet traces - these become covered by layers of sediment , which eventually become rock.
<span>Darwin's theory with relation to similarities amongst unrelated organisms looks at either similar form or similar function of appendages and from this it is postulated that some organisms have common ancestors based on these similarities. A broad example would be the fact that most vertebrates (organisms with spines) stemmed from one or a group of common ancestors, while invertebrates (lack of a spine) are related to common ancestor or groups of common ancestors. So the answer to the question is yes, it is true.</span>
Rockskipper, Pufferfish and Peacock Flounder
While examining a cell under transmission electron microscope, it is observed that the high density of ribosomes present in the cytoplasm produces large amounts or protein molecules. Ribosome contains rRNA and proteins. rRNA directs the catalytic process of protein synthesis.
The messenger RNA or mRNA that have the coding sequences exits from the nucleus and enters the ribosome and gets translated to form proteins. The transfer RNA or tRNA relocates amino acids from nucleus to the ribosome.