文档介绍：,whichisbelowtheground,,orabsorbs,waterandmineralfromthesoilthroughtheroothairs,whicharesinglecellsnearthetipofeachroot根毛是靠近根顶端的单细胞,,plantssuchascloverandLucerne,knownas‘legumes’,一些豆科作物,如三叶草和苜蓿,,orspermatic,whicharecarriedinthepollengrains雄蕊产生雄性细胞或是性孢子,,theripenedovaryoftheflower,enclosestheseedsandprotectsthemwhiletheyaredeveloping,果实,花中成熟的子房,包围着种子,,,orinarestingstate,,,,,we