The performance and achievement of programs on classical taxonomy of spore plants in nsfc 国家自然科学基金孢子植物经典分类项目资助概况和研究进展
2.
External fertilization occurs when gametes are expelled into a watery substrate from the parental bodies before fusion ; it is typical of sporebearing plants 当配子在融合之前从亲本体中排出到有水介质时发生体外受精，这是孢子植物的特征。
3.
8 % ) , which is similar to the mt protein of ostrea edulis while different from that of drosophila and mammalian ( no aromatic amino acid and histidine ) . comparison of the deduced amino acid sequence of housefly mt with other species " mt showed that its identity with drosophila was highest , attain 65 % ; the different metallothioneins , within a part species of invertebrate , were 35 % - 41 % isologous ; its identi ty wi th the mt - ii of green monkey was 41 % and that with the human mt - ii was 35 % 由扩增片段的编码序列所推导的家蝇mt与其它生物mt比较显示：家蝇mt氨基酸序列与果蝇( drosophilamelanogaster ) mtn氨基酸序列的同源性最高，达到65 ；与部分无脊椎动物mt氨基酸序列的同源性在35 - 41的范围内；与部分植物mt氨基酸序列的同源性比较结果为：同源性最高的为孢子植物墨角藻( fucusvesiculosus ) ( 51 ) ，而最低的为种子植物鼠耳芥( arabidopsisthalianal ) ( 35 ) ；与哺乳动物绿猴mt -的同源性达到41 ，与人类mt -的同源性为35 。
