Definition:The existence of two forms of individual within the same animal species(independent of sex differences).雙形現(xiàn)象shuāng xíng xiàn xiàng指一個(gè)種具有兩種不同特征類(lèi)型的現(xiàn)象,如雌雄個(gè)體的特征不同,有孔蟲(chóng)的顯球型和微球型明顯不同。Example:Pick two ......(本文共 366 字) [閱讀本文] >>