Answer:
The tail of the sperm, the flagellum
Explanation:
We find cilia in the human body. They coat the epithelial cells of the upper respiratory tract and play a role in keeping dust particles, smog, and potentially harmful microorganisms from entering the lungs.
Their movements enable the movement of mucus or other substances across the surface of various epithelial cells. The cilia also cover parts of the male and female reproductive tract.
Flagella are found in sperm, whose tail represents the flagellum in its structure. The body wall of the sponge, among others, contains cells with whips that create and maintain the flow of water through the body.
Sounds quite appealing as the molecules listed are relatively common. However, they are only reactive under precise environmental conditions, including energy, which are far from adequate to produce the progressively higher levels of complexity required for the levels of biochemical assembly needed for life.
The next higher levels also require sulfur and phosphorus for the formation of homochiral amino acids and sugars, which are elemental level molecules required for DNA construction, which is found in all living things. These ostensibly are the "organic molecules" but only function as homochiral versions.
The mixture is solids, liquids and gases, which makes a name of mythical primordial or prebiotic soup most likely.
Mitosis is a form of asexual reproduction. The cells multiply and divide. As the cells grow so does the organism.
The answer is population!