在晝夜周期條件下,維持植物正常生命活動所需要的最低光照強(qiáng)度應(yīng)  ( )

A.大于光補(bǔ)償點(diǎn) B.等于光補(bǔ)償點(diǎn)
C.小于光補(bǔ)償點(diǎn)D.大于或等于光補(bǔ)償點(diǎn)

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科目:高中生物 來源: 題型:

在晝夜周期條件下,維持植物正常生命活動所需要的最低光照強(qiáng)度應(yīng)   (  )

  A、大于光補(bǔ)償點(diǎn)      B、等于光補(bǔ)償點(diǎn)

  C、小于光補(bǔ)償點(diǎn)      D、大于或等于光補(bǔ)償點(diǎn)

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科目:高中生物 來源:2011-2012學(xué)年江西省高三第八次周考考試生物試卷 題型:綜合題

 

30、Ⅰ(7分)為探究環(huán)境因素對植物光合作用強(qiáng)度的影響,設(shè)計(jì)進(jìn)行如下實(shí)驗(yàn):

實(shí)驗(yàn)材料和用具:圖示實(shí)驗(yàn)裝置(廣口瓶容積為500mL)、100 mL量筒、200W的臺燈、冷開水、不同濃度的NaHCO3溶液(冷開水配制)、黑藻等。實(shí)驗(yàn)重復(fù)三次,實(shí)驗(yàn)結(jié)果見下表。                                                                                                                                            

 

分析并回答下列有關(guān)問題:

(1)該實(shí)驗(yàn)中的自變量是            ,列出實(shí)驗(yàn)中的至少兩個(gè)控制變量(無關(guān)變量):

                                       

(2)試補(bǔ)充完成該實(shí)驗(yàn)探究的具體實(shí)驗(yàn)步驟。                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

①準(zhǔn)備4套如圖裝置,編號為1----4,分別在各瓶中注入冷開水、0.1%NaHC03溶液、1.0%NaHC03溶液、5.0%NaHC03溶液各約500mL;

②取                                    ,分別放入各實(shí)驗(yàn)裝置,并組裝好實(shí)驗(yàn)裝置;

③將4套裝置             ,然后分別用                    ;

④30min后,                                      

⑶由于黑藻自身呼吸作用會消耗氧氣,故量筒中收集到的水的體積

不能表示為黑藻30min內(nèi)的光合總量,請根據(jù)上表繪制出相關(guān)的

柱形圖。

 

 

 

 

 

 

 

 

 

 

 

 

Ⅱ(5分)植物的光合作用受內(nèi)、外多種因素的影響,如圖是在20℃、0.03%CO2濃度條件下,測得A、B兩種植物在不同光照條件下光合速率變化曲線。請據(jù)圖回答問題:

(1)圖示表明,       植物更適宜在弱光照條件下生長,這是由植物本身的              決定的。生產(chǎn)上如果將A、B共同種植,形成群落的         結(jié)構(gòu),將可達(dá)到充分利用光能的目的。

(2)在晝夜周期條件下(12h光照、12h黑暗),A植物需在光照強(qiáng)度___   __千勒克斯才能生長。

(3)當(dāng)光照強(qiáng)度為8千勒克斯時(shí),A植物每小時(shí)光合作用所制造的有機(jī)物量與B植物制造的有機(jī)物量的比例是         。

 

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科目:高中生物 來源:高中生物奧林匹克競賽典型試題精練之三 題型:選擇題

在晝夜周期條件下,維持植物正常生命活動所需要的最低光照強(qiáng)度應(yīng)   (  )

  A、大于光補(bǔ)償點(diǎn)      B、等于光補(bǔ)償點(diǎn)

  C、小于光補(bǔ)償點(diǎn)      D、大于或等于光補(bǔ)償點(diǎn)

 

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科目:高中生物 來源:2012屆江西省吉水中學(xué)高三第八次周考考試生物試卷 題型:綜合題



30、Ⅰ(7分)為探究環(huán)境因素對植物光合作用強(qiáng)度的影響,設(shè)計(jì)進(jìn)行如下實(shí)驗(yàn):
實(shí)驗(yàn)材料和用具:圖示實(shí)驗(yàn)裝置(廣口瓶容積為500mL)、100 mL量筒、200W的臺燈、冷開水、不同濃度的NaHCO3溶液(冷開水配制)、黑藻等。實(shí)驗(yàn)重復(fù)三次,實(shí)驗(yàn)結(jié)果見下表。                                                                                                                                           
分析并回答下列有關(guān)問題:

(1)該實(shí)驗(yàn)中的自變量是           ,列出實(shí)驗(yàn)中的至少兩個(gè)控制變量(無關(guān)變量):
                                       
(2)試補(bǔ)充完成該實(shí)驗(yàn)探究的具體實(shí)驗(yàn)步驟。                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          
①準(zhǔn)備4套如圖裝置,編號為1----4,分別在各瓶中注入冷開水、0.1%NaHC03溶液、1.0%NaHC03溶液、5.0%NaHC03溶液各約500mL;
②取                                   ,分別放入各實(shí)驗(yàn)裝置,并組裝好實(shí)驗(yàn)裝置;
③將4套裝置            ,然后分別用                   ;
④30min后,                                      
⑶由于黑藻自身呼吸作用會消耗氧氣,故量筒中收集到的水的體積
不能表示為黑藻30min內(nèi)的光合總量,請根據(jù)上表繪制出相關(guān)的
柱形圖。


Ⅱ(5分)植物的光合作用受內(nèi)、外多種因素的影響,如圖是在20℃、0.03%CO2濃度條件下,測得A、B兩種植物在不同光照條件下光合速率變化曲線。請據(jù)圖回答問題:
(1)圖示表明,      植物更適宜在弱光照條件下生長,這是由植物本身的             決定的。生產(chǎn)上如果將A、B共同種植,形成群落的        結(jié)構(gòu),將可達(dá)到充分利用光能的目的。
(2)在晝夜周期條件下(12h光照、12h黑暗),A植物需在光照強(qiáng)度___  __千勒克斯才能生長。
(3)當(dāng)光照強(qiáng)度為8千勒克斯時(shí),A植物每小時(shí)光合作用所制造的有機(jī)物量與B植物制造的有機(jī)物量的比例是        

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