四名词解释 Growth retardants 2种子寿命 3种子活力 4组织培养 5细胞周期 6顶端优势 7极性 8向性运动 9感性运动 五解释现象 1为什么贮藏种子时必须晒干后才能进仓? 2种子萌发过程中无机磷的含量增高后,肌醇六磷酸活性降低。 3温室栽培作物如何调节光照条件以获得较高的光合效果。 4水稻为什么要烤田? 5小麦倒伏后还会直立,为什么? 6果树有时会出现大小年,为什么? 7为什么日温较高夜温较低能提高甜菜、马铃薯的产量? 六问答题 I If a sign is nailed into a tree trunk five feet from the ground and the tree grows three inches every year, then how high from the ground will the sign be in after 100 years? 2 Under what types of conditions would you expect a plant to have a very large, extensive root system, but small stem and leaf systems? 3 How do the combined affects of phototropism and gravitropism benefit seeds after being 4 If a gardener wanted to speed up the process of germination, what light treatment would she most likely use? Exactly how does that light treatment spread up germination? 5种子萌发时,发生了哪些生理变化?请详细说明 6为什么说种子萌发时需要水和氧气? 7试述光对植物生长的影响。 8综述植物生长的相关性 9哪些外界条件能影响植物的生长? 10试述顶端生长抑制侧生生长的原因。 l1种子萌发时,有机物质发生哪些生理生化变化? 12何谓向地性?植物根向地性的原因何在?四 名词解释 1 Growth retardants 2 种子寿命 3 种子活力 4 组织培养 5 细胞周期 6 顶端优势 7 极性 8 向性运动 9 感性运动 五 解释现象 1 为什么贮藏种子时必须晒干后才能进仓？ 2 种子萌发过程中无机磷的含量增高后，肌醇六磷酸活性降低。 3 温室栽培作物如何调节光照条件以获得较高的光合效果。 4 水稻为什么要烤田？ 5 小麦倒伏后还会直立，为什么？ 6 果树有时会出现大小年，为什么？ 7 为什么日温较高夜温较低能提高甜菜、马铃薯的产量？ 六 问答题 1 If a sign is nailed into a tree trunk five feet from the ground and the tree grows three inches every year, then how high from the ground will the sign be in after 100 years? 2 Under what types of conditions would you expect a plant to have a very large, extensive root system, but small stem and leaf systems? 3 How do the combined affects of phototropism and gravitropism benefit seeds after being dispersed? 4 If a gardener wanted to speed up the process of germination, what light treatment would she most likely use? Exactly how does that light treatment spread up germination? 5 种子萌发时，发生了哪些生理变化？请详细说明。 6 为什么说种子萌发时需要水和氧气？ 7 试述光对植物生长的影响。 8 综述植物生长的相关性。 9 哪些外界条件能影响植物的生长？ 10 试述顶端生长抑制侧生生长的原因。 11 种子萌发时，有机物质发生哪些生理生化变化？ 12 何谓向地性？植物根向地性的原因何在？