Fire ants make use of an alarm pheromone to________workers to an emergency, and their scouts lay down a trail as a guide during

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问题 Fire ants make use of an alarm pheromone to________workers to an emergency, and their scouts lay down a trail as a guide during mass migrations.

选项 A、alert
B、allot
C、alternate
D、adapt

答案A

解析 发生紧急情况时,火蚁利用报警信息素提醒工蚁。在大规模迁徙中负责侦查的蚁种会留下一串痕迹作为引导线索。A项alert “使警觉;使注意”,B项allot“分配,分派”,C项alternate“交替;轮流”,D项adapt“适应;改编”。
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