Deserts and extreme environments pose unique challenges for the organisms that inhabit them. These ar _ _ _ are charac _ _ _ _ _ _ _ by ha_ _ _ conditions su _ _ as int_ _ _ _ temperatures, sca _ _ _ water, a_ _ limited veget _ _ _ _ _. Specialized adapt_ _ _ _ _ _ have evo_ _ _ _ in both plants and animals to increase survival. Studying these traits provides insights into the resilience of life and helps in understanding how ecosystems function under stress. Desert cacti store water in specialized tissues, while fence foxes have enlarged ears for heat dissipation, and certain bacteria can survive in extreme alkaline conditions that would be lethal to most life-forms.
Tigers are solitary animals known for their territorial behavior; males use scent markings and vocalizations to define their territories. Each ma_ _ tiger estab_ _ _ _ _ _ control ov _ _ a la_ _ _ territory span_ _ _ _ several squ_ _ _ miles a_ _ patrols t_ _ area regu_ _ _ _ _ to lo_ _ for prey and maintain dominance. This behavior helps reduce conflicts over prey, but tigers are known to fiercely defend their territory from intruders when necessary. Often hunting at night, tigers use stealth and their excellent night vision to their advantage.
第三篇： The Great Plains of North America were once home to vast herds of bison, which played a crucial role in the lives of Indigenous peoples, who made use of bison meat, hides, and bones. These commu_ _ _ _ _ _ relied o_ bison f_ _ food, clot_ _ _ _, and she_ _ _ _. Hunting prac_ _ _ _ _ were of_ _ _ sophisticated, invo_ _ _ _ _ coordinated eff_ _ _ _ to dr_ _ _ bison into traps or over cliffs. The arrival of European settlers dramatically altered the landscape, leading to overhunting and near extinction of bison populations. Conservation efforts in the twentieth century helped restore bison umbers, symbolizing resilience and recovery.
答案 1. areas 2. characterized 3. harsh 4. such 5. intense 6. scarce 7. and 8. vegetation 9. adaptations 10. evolved
答案 1. male 2. establishes 3. over 4. large 5. spanning 6. square 7. and 8. this 9. regularly 10. look
答案 1. communities 2. on 3. for 4. clothing 5. shelter 6. practices 7. often 8. involving 9. efforts 10. drive
