【判断题】
欧洲大榆小蠹和欧洲榆小蠹可通过体长加以区分。
A. 对
B. 错
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答案
B
解析
暂无解析
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双翅目昆虫仅有1对发达的膜质前翅,后翅已特化成平衡棒。
A. 对
B. 错
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葡萄根瘤蚜可随苗木运输进行远距离传播。
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B. 错
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小蠹虫除直接为害寄主外,还可以传播植物病害。
A. 对
B. 错
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缨翅目昆虫通称蓟马,身体微小。复眼发达,有或无单眼。触角较长,6-10节。口器为左右不对称的锉吸式口器。
A. 对
B. 错
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白蚁和蚂蚁在分类学中属于同一目下。
A. 对
B. 错
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在对进口木材现场检疫时,如发现活体白蚁,货物应进行熏蒸等检疫处理。
A. 对
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B. 错
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无蓝变现象的木质包装上肯定没有松材线虫。
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线虫可通过人为的传带、种苗的调运等进行远距离的传播。
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B. 错
【判断题】
在没有媒介昆虫的条件下,松材线虫可以自己从发病树转移到健康树危害。
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松树被松材线虫感染后,当年均会发病,表现为针叶枯萎。
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在国外无显著危害的植物寄生线虫,不必予以关注,不属于检疫性线虫。
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毛刺属线虫能携带并传播植物病毒。
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B. 错
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线虫体形很小,其危害症状一般不明显。
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B. 错
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可用直接解剖法分离木质包装中的松材线虫。
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实验室对线虫进行形态学鉴定时,一般先鉴定到属,然后鉴定到种。
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B. 错
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所有植物线虫都位于植物根部和土壤中。
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B. 错
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部分线虫可以人工培养。
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多数植物线虫寄生于植物根部,少数可寄生于植物的幼芽、茎、叶、花、果实和种子内。
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B. 错
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植物线虫都是体内寄生。
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B. 错
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植物受线虫危害后,发生明显病变的部位,往往也是病原线虫存在的部位。
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植物被线虫危害后可能没有症状。
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B. 错
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世界卫生组织(WHO)将转基因生物定义为遗传物质通过非自然交配和/或非自然重组的方式发生改变的生物体(即植物、动物或微生物)。
A. 对
B. 错
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基因编辑技术是通过改变自身基因的表达获得优良性状,转基因技术是要依赖外源基因的表达获得优良性状。
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B. 错
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B. 错
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转基因可以跨越物种的界限,微生物的基因也可以被转入到植物中。
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我国市面上销售的甜玉米和圣女果都是转基因产品。
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B. 错
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