One potential example of a species made of different biochemistry based on pollution could be a hypothetical species of extremophiles that have evolved to thrive in heavily polluted environments. These organisms may have developed unique biochemical pathways that allow them to detoxify and metabolize pollutants that are toxic to other life forms. For example, these extremophiles may have enzymes that are able to break down and neutralize heavy metals, chemicals, or plastics that are commonly found in polluted water or soil. They may also have specialized cell membranes or organelles that can protect them from the harmful effects of pollution. In addition, these organisms may have evolved unique ways of obtaining energy and nutrients from pollutants, such as through chemosynthesis or other unconventional metabolic pathways. This would allow them to not only survive in polluted environments, but to actually thrive and outcompete other organisms. Overall, this hypothetical species made of different biochemistry based on pollution would represent a fascinating example of evolution in action, demonstrating the incredible adaptability of life forms in the face of changing environmental conditions.

A species with biochemistry based on liquid salt as a solvent would have evolved in an environment where water is unavailable or present only in limited quantities. In this extreme environment, organisms would have adapted to thrive in a medium composed of liquid salt, such as molten sodium chloride or other ionic compounds. One possible adaptation in these organisms could be the development of specialized cell membranes that are impermeable to salt ions. These membranes would prevent the loss of essential molecules and ions while allowing the exchange of nutrients and waste products with the surrounding salty environment. Furthermore, these species may have evolved unique biochemical pathways to utilize salt ions as an energy source or as building blocks for essential molecules. For example, they could have enzymes that can efficiently extract energy from redox reactions involving salt ions, or use them as cofactors in metabolic processes. Additionally, this hypothetical species could have evolved special mechanisms to maintain osmotic balance in the salty environment. They might have evolved unique ways to regulate the concentration of salt ions inside their cells and adapt to changes in salinity. Overall, a species with biochemistry based on liquid salt as a solvent would represent an extreme example of adaptation to a harsh environment and showcase the diversity of life forms that can exist under different chemical conditions.