2023龙岩三检化学答案

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22.(共10分,除标注外,每空1分)(1)生产者消费者分解者(2)发达的根系有利于植物吸收水分,小而厚的叶片减少了水分的蒸发,利于植物的生长(2分)(3)荒漠地区生产者数量较少,将无机物转化为有机物的速度较慢,光合作用合成的有机物少;且因荒漠地区严重缺水,分解者的分解作用也较级慢(4分)(4)次生【命题意图】本题以荒漢生态系统为背景,具体考查生态系统的成分、物质循环、群落的演替等知识,意在考查考生的综合分析能力。【解析】(1)生态系统的成分有非生物的物质与能量及生产者、消费者、分解者(三类生物成分)。(2)荒漠中的多数植物如仙人掌,具有发达的根系和小而厚的叶子,发达的根系利于植物从干旱的土壤环境中更好地吸收水分;小而厚的叶片使得植物在干旱环境中由蒸腾作用散失的水分大大减少,有利于植物适应干旱环境。(3)在生态系统中,完成物质循环依赖生产者与分解者这两大生物成分,生产者通过光合作用,将无机环境中的无机物合成有机物,分解者通过分解作用,将动植物遗体残骸与动物排遗物分解为无机物;而荒漠生态系统中生产者数量少,合成的有机物少,又由于干旱缺水,分解者的分解作用也比较缓慢。(4)荒漠环境虽然干旱,但依然有一定的土壤条件,也保留了植物的种子或者其他繁殖体,因此题干所述过程发生了次生演替。,

第二节(满分25分)Soon I created my website go. picking up. com. On the website I launched a rubbish removacampaign. I described my purpose-calling on volunteers to pick up rubbish. I posted pictures ofrubbish littered about on the website, which could not only illustrate the severe situation but alsoshow that a large number of volunteers were in great need. Besides, I shared the story of VLady who influenced me so much. Surprisingly, my website gradually became a big hit on theInternetMore and more people put on vests with their own names. Volunteers could be seen pickinup rubbish in their spare time. The yellow vests made beautiful scenery in the park or on thestreet. With our joint efforts the environment became better and better What delighted me mostwas that peoples awareness of environmental protection was improved. The rubbish removalcampaign was a big success. Thanks to Vest Lady who rooted the sense of environmentalprotection in my mind, more people became Vest Lady