2020-2021学年生物冀少版八年级下册随堂检测（14）食物链和食物网
※题型：单选题※知识点：单选题※试题难度：中等<br>“大鱼吃小鱼,小鱼吃虾米”这一食物链可以准确地表示为( )<br>A.虾米→小鱼→大鱼<br>B.大鱼→小鱼→虾米<br>C.阳光→虾米→小鱼→大鱼<br>D.植物→虾米→小鱼→大鱼<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/913a294e508a4ef1bc8c2ffadf280ee9/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/39a60e866db74928850a24b783278d9f/74DA1408910AE994A94F2D7277BD3F17.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>下列食物链正确的是( )<br>A.草→蚱蜢→食虫鸟→蛇→鹰<br>B.蚱蜢→草→食草子的鸟→鹰→狐<br>C.狐→鹰→食虫鸟→蚱蜢→草<br>D.草←蚱蜢←食虫鸟←鹰←蛇<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/b6da57b32a4b40a6ab154259083022cd/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/43ad870b513541efa0cab614d71f12bf/FD2F7C3958EE388BD4FA5C40187CF0EF.png"><br><br>※题型：单选题※知识点：单选题※试题难度：较易<br>下列关于生态系统能量流动的叙述中,正确的是( )<br>A.单方向的,逐级减少的 B.单方向的,逐级增加的<br>C.可循环的,逐级减少的 D.可循环的,逐级增加的<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2018/a75a3c4c7b134de79865922caae5cd22/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2018/c647a4c7aa70445e881abbea97718d6c/D450BF504DB6F89C5B5F88EFEEDE886D.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>古诗词里蕴含着不少生物学现象或规律。“落红不是无情物,化作春泥更护花”蕴含的生物学规律是( )<br>A.生物圈的物质循环 B.生物间的竞争关系<br>C.生物适应环境 D.生物的变异现象<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2021/a59c972da2c641138685647f6075a055/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2021/31cf900c6cca4a3282fe1d7aa4058e42/C6F88C89C337BEA9110421423B4AF312.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>如图展示了四种生物的相对数量,若难分解的毒性物质有机汞污染了由这些生物构成的食物链,体内有机汞含量最高的生物是( )<img src="https://picture2.zhihuicn.com/testImage/2/2020/9/21/1035C081A80B7BB0512025A341BA787D.png"><br>A.甲 B.乙 C.丙 D.丁<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/d5c5bf4ff3644ce6997f0817f2c621c2/E7F0EDF83F40244C8F0C84B97471AED6.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/92cb1ca1a174498db8654c55bf91279c/5A7BFBBA7EF3A891F49BCE88FE3408EE.png"><br><br>※题型：单选题※知识点：单选题※试题难度：中等<br>水误病是由于汞中毒引起的,在“水草→虾→鱼→鱼鹰”食物链中体内汞含量最高的是( )<br>A.水草 B.虾 C.鱼 D.鱼鹰<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/04349b7a14a54efcab10f6eee95b8088/01A39E48B8A67989A23F6887F26FCC64.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/9f7fc0d43613464e8e6cce16d59b73a0/962F141AF1C38B60ED2B0E6F17A298D3.png"><br><br>※题型：读图填空题※知识点：读图填空题※试题难度：中等<br>如图所示,这是生态系统中一个简单的食物网,请看图回答下列问题。<br><img src="https://picture2.zhihuicn.com/testImage/2/2020/7/21/979AEDB4ADA0C384C6D1B36CF5939A27.png"><br>1.这个食物网中有食物链条。<br>2.这个食物网中的生产者是。<br>3.请你书写食物网中,最长的一条食物链:。<br>答案<br><img src="https://picture2.zhihuicn.com/answer/2/9/2020/2a815c96f476417fa1468d4aa1750c6c/2467854109A41E8F2DF3D468ABD866A8.png"><br>解析<br><img src="https://picture2.zhihuicn.com/explain/2/9/2020/0ea683dd979d442a9699a4df3a8ae00b/34E7008261697B88A2425FCD9D6C4923.png"><br><br>
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