如图表示不同浓度生长素对芽生长的影响。当植物表现出顶端优势时

如图表示不同浓度生长素对芽生长的影响。当植物表现出顶端优势时,顶芽和最靠近顶芽的侧芽所含生长素的浓度依次分别为(  )

A.a和b

B.b和a

C.b和c

D.c和b

答案

C

相关题目

下列溶液中物质的量浓度为1mol/L的是(   ) A.将40gNaOH固体
下列溶液中物质的量浓度为1mol/L的是(   ) A.将40gNaOH固体溶解于1L水中      B.将22.4L氯化氢气体溶于水配成1L溶液 C.将1L 10 mol/L的浓盐酸与9L水
控制生物性状的基因是指 A.DNA分子的片段 B.DNA分子的一条
控制生物性状的基因是指 A.DNA分子的片段 B.DNA分子的一条链 C.DNA分子中脱氧核苷酸的排列顺序 D.有遗传效应的DNA片段
以下工业城市中,属于围绕某个大型企业而发展起来的是  
以下工业城市中,属于围绕某个大型企业而发展起来的是   A.天津              B.大庆市               C.兰州市         D.上海市
 汤因比说:“人们将记住这个时代,这主要不是因为它的令
 汤因比说:“人们将记住这个时代,这主要不是因为它的令人恐怖的罪恶,也不是因为它的令人惊讶的发明,……人们要敢于认为让文明的益处为整个
— What’s the main purpose of tonight’s meeting? — We are going to talk a
— What’s the main purpose of tonight’s meeting? — We are going to talk about the problem _______ at the last meeting. A. having discussed       B. to be discussed   C. being discussed
    A Good Friend, A Second Self I couldn’t believe my ears when I heard my
    A Good Friend, A Second Self I couldn’t believe my ears when I heard my name called for the leading role in our high school play. Mrs. Dermitt, my drama teacher, had been looking for someon
 An old lady went out shopping last Sunday. She came to a bank(银行)and
 An old lady went out shopping last Sunday. She came to a bank(银行)and saw a car near the door . A man got out of it(下车) and went into the bank . She looked into the car. The keys we

最新题目