Q.Explain soil as an abiotic factor and describe the adaptations of organisms living at high altitude and in dehydrating conditions.

[!TLDR] Soil texture/fertility shapes which plants (and dependent animals) live in an area; high-altitude organisms adapt to low oxygen via more red blood cells, while dehydration-adapted organisms conserve water via concentrated urine and nocturnal activity. …

Soil is a foundational abiotic factor for terrestrial life: it supplies anchorage, water and mineral nutrients to plants, and its texture, structure, pH, mineral composition and moisture-retention capacity determine which plant species — and, indirectly, which animal species dependent on those plants — can establish themselves in an area. Soil-dwelling organisms such as earthworms and soil microbes are themselves shaped by soil texture and aeration, while contributing to soil fertility through decomposition.

High-altitude adaptations address the combined stresses of low atmospheric oxygen, low temperature, and high UV exposure. Adapted organisms typically show an increased red blood cell count and haemoglobin with higher oxygen affinity (compensating for reduced oxygen availability), an increased breathing rate, and sometimes smaller body size or denser insulation to conserve heat. …

• Mixing up altitude adaptations (oxygen-focused) with dehydratio …