electron micrograph of negative-stained prochlorococcus. a cyanophage is a virus that infects cyanobacteria. - 細胞膜 幅插畫檔、美工圖案、卡通及圖標
set of main food groups, macro and micronutrients. fats, fiber or cellulose, carbs and proteins - 細胞膜 幅插畫檔、美工圖案、卡通及圖標蛋白質, 碳水化合物 - 食品, 複雜性
xylem and various different types of lignin secondary cell wall formations - 19th century - 細胞膜 幅插畫檔、美工圖案、卡通及圖標
microscopic view of the eastern equine encephalitis disease floating on black background. - 細胞膜 幅插畫檔、美工圖案、卡通及圖標
cholesterol is an important raw material for the human body: it is needed for the formation of certain hormones and is a building block of the cell membrane - 細胞膜 幅插畫檔、美工圖案、卡通及圖標