A. Fix nitrogen in the air B. Decompose organic matter C. photosynthesis D. Parasitism 相关知识点: 试题来源: 解析 A。固氮细菌的主要作用是将空气中的氮气固定。分解有机物不是固氮细菌的主要作用;光合作用不是固氮细菌的作用;寄生不是固氮细菌的作用。反馈...
Many insects feed on a low‐nitrogen diet,and the origin of their nitrogen supply is poorly understood.It has been hypothesized that some insects rely on nitrogen‐fixing bacteria(diazotrophs)to supplement their diets.Nitrogen fixation by diazotrophs has been extensively studied and convincingly ...
根据第一段最后一句“Seeking a greenerandmoresustainablealternative, somefarmershavestartedapplyingnitrogen-fixingbacteriatotheircrops.”(为了寻求一种更环保、更可持续的替代品,一些农民开始在作物上施用固氮菌。)可知,第一段提到传统的化学肥料是为了引入话题,故选A。13.【答案】D【解析】题意为:关于固氮细菌...
What does FBS do in a cell culture? Which cells of the adaptive immune system release cytokines? What are nitrogen-fixing bacteria? What anaerobic bacteria do beta-lactamase inhibitors affect? What is DMSO in cell culture? What is DMSO used for in cell culture?
In the case of denitrification, certain anaerobic bacteria that don't need oxygen convert nitrate to nitrogen gas, which floats up into the atmosphere and plays hard-to-get until some lightning or a crafty nitrogen-fixing bacterium comes along and ropes the gaseous nitrogen into the nitrogen cycl...
While these nitrogen-fixing bacteria were fixing about 100-300 Tg (terra gram) of nitrogen per year, with the changes to the farming pattern, this increased by about 15 Tg. With the invention of the Haber-Bosch process, our production of reactive nitrogen shot up to a staggering figure of...
microorganisms called diazotrophs, including bacteria such as azotobacter, and archaea, naturally conduct nitrogen fixation in the soil. some nitrogen-fixing bacteria, particularly legumes, have symbiotic relationships with certain plant groups. q4 what would happen if nitrogen-fixing bacteria did not ...
Nitrogen-fixing bacteria in soil convert nitrogen gas into a form that plants can use. 6 Pathogen They can be target-specific, affecting only certain organisms or cell types. The HIV virus specifically targets the immune system's CD4+ T cells. 6 Microbe Tiny living organisms that can only be...
For example, some kinds of soil bacteria take nitrogen from the air and make it into a form that plants can use. The plants hold the nitrogen in their roots. Legumes(豆科植物)are especially good at this nitrogen(氮)-fixing. Then any crops that share the same space with the legumes can...
Discuss nitrogen-fixing, nitrifying, and denitrifying bacteria, the main biochemical reactions they carry out, their role in nitrogen cycling, and the significance of such cycling in the ecosystems an Which part of the human body would be highly affected by a nuclear radiation first?