RESPOND THOUGHTFULLY TO THIS DISCUSSION POST The Question: What does it mean to be an extremophile? Describe one extremophile condition and explain how it would relate to the environment that a prokaryote is growing within. How might it alter their growth cycle/curve?

The Person's Extremophiles are any organism living in any ecological condition outside the normal growth condition which is determined by nutrition and niche-specific physical parameters like temperature and pH. An environment with extremely high temperatures can be considered an extremophile condition, the growth curve for prokaryotes living in the environment is different. For E. g. Picrophilus torridus is a thermoacidophile adapted to acidic and hot conditions.

Psychrophiles: ~0°C–20°C
Mesophiles: ~15°C–45°C
Thermophiles: ~40°C–80°C
Hyperthermophiles: ~65°C–121°C

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Extremophile, an organism that is tolerant to environmental extremes and that has evolved to grow optimally under one or more of these extreme conditions, hence the suffix phile, meaning “one who loves.”

Extremophilic organisms are primarily prokaryotic (archaea and bacteria), with few eukaryotic examples. Extremophiles are defined by the environmental conditions in which they grow optimally. The organisms may be described as acidophilic (optimal growth between pH 1 and pH 5); alkaliphilic (optimal growth above pH 9); halophilic (optimal growth in environments with high concentrations of salt); thermophilic (optimal growth between 60 and 80 °C [140 and 176 °F]); hyperthermophilic (optimal growth above 80 °C [176 °F]); psychrophilic (optimal growth at 15 °C [60 °F] or lower, with a maximum tolerant temperature of 20 °C [68 °F] and minimal growth at or below 0 °C [32 °F]); piezophilic, or barophilic (optimal growth at high hydrostatic pressure); oligotrophic (growth in nutritionally limited environments); endolithic (growth within rock or within pores of mineral grains); and xerophilic (growth in dry conditions, with low water availability). Some extremophiles are adapted simultaneously to multiple stresses (polyextremophile); common examples include thermoacidophiles and haloalkaliphiles