A characteristic of the bacteria family to which clostridium difficile belongs is the ability to produce spores when under stress 艰难梭菌- -这个细菌家族的特点是能够在应激状态下产生孢子。
2.
The haploid plant produces gametes mitotically and is thus termed the gametophytes while the diploid plant produces spores meiotically and is called the sporophyte 单倍体植物有丝分裂产生配子体，二倍体减数分裂产生孢子体。
3.
The carpel is homologous with the megasporophylls of certain spore - bearing vascular plants ( pteridophytes ) and the ovuliferous scales of gymnosperms 心皮和能产生孢子的维管植物（羊齿类）还有具胚珠的裸子植物的大孢子叶是同源的。
