James Hutton
Uniformitarianism is the principle or assumption that the same natural laws and processes that operate in the universe now have always operated in the universe in the past and apply everywhere in the universe. This concept became known as uniformitarianism and can be summarized by the phrase "the present is the key to the past."
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Answer:
Organic matter produced when an organism is alive remains unchanged in unaltered fossil while the opposite happens in cases of altered fossil
Explanation:
When the organic material produced by an organism during the time period when it was alive remains unchanged in the given course of time then it is termed as unaltered or original preservation. for example - bones, teeth etc, remain intact.
While in case if the organic material produced by an organism during the time period when it was alive changes in due course of time by the external forces is called as altered fossil
I’m pretty sure the answer is the third choice
The organism that has no specialized cell is Paramecium.
Paramecium are members of the phylum Ciliophora. They feed on organisms like bacteria, algae, and yeasts . These organisms uses cilia to sweep the food along with some water into the cell after it falls into the oral groove. The food then goes through the cell mouth into the gullet.