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north american ticks of the genera antricola and otobius possess vestigial hypostomes

标签: north,american,ticks,of,the,ge 浏览: 17

as arthropods moths possess an exoskeleton composed of chitin

标签: as,arthropods,moths,possess,an 浏览: 15

spiders possess an exoskeleton composed of chitin molecule made up of bound units of acetylglucosamine

标签: spiders,possess,an,exoskeleton 浏览: 13

these cells possess no nucleus

标签: these,cells,possess,no,nucleus 浏览: 15