For which of the following bird species is the standard deviation of the numbers of sightings shown for the four seasons least A. Cardinal B. Junco C. Robin D. Sparrow E. Wren 相关知识点: 试题来源: 解析 D 正确答案:D 题目解析:此题解题要点有两个,首先考生需要理解standard deviation也就是...
Tree of life reveals which bird species to saveA new genetic analysis reveals which birds are the most unique, and identifies 113 locations that should be protected to conserve the majority of bird diversitydoi:10.1016/S0262-4079(14)60613-8Coghlan...
A. All 44 bird species decreased. B. Only 8 of the species declined. C. 14 of the observed species declined. D. There was no change in the number of the bird species. 相关知识点: 试题来源: 解析 C 答案C 解析 细节理解题。根据第四段第二句内容可知,在可观察的鸟当中有14种鸟的数量下...
aIn contrast, Breeding Bird Surveys are based on a network of sampling locations at which species occurrence and relative abundance are collected at given time steps to document temporal trends. 相反,养殖鸟勘测根据的采样地点网络种类发生和相对丰盈收集在特定时间步进值到文件世俗趋向。[translate]...
Which forest bird species are the main hosts of the tick, Ixodes ricinus, the vector of Borrelia burgdorferi sensu lato, during the breeding season? Int. J. Parasitol. 42, 781-788 (2012).Marsot M, Henry P.Y, Vourc'hG,Gasoui P, Ferguel E, Laignel J, Grysan M, Chapuis J.L. ...
Few studies of preferential eye use have been conducted in the wild and it is not clear if such preferences in the wild are widespread, how individuals can benefit from them, and which ecological factors influence their evolution. In a wild species of bird the extent to which foraging success...
8 million living species(物种), and that’s just a small part of what probably exists on Earth.With so many plants, animals, fungi, and other organisms covering the planet, it can be tough to figure out what type of spider is crawling up your leg or what kind of bird just flew by....
根据第三段中 By introducing a“crowd-breeding” model, it transformed the bird into a species whose price and source of supply were publicly known. This lessened the status of keeping such birds and thereby reduced their profitability to black market suppliers.(通过引入"人群繁殖"模式,它把八哥...
Nitrogen is an essential element for life. However, accumulation of nitrogen in organisms can lead to excess formation of ammonia, a toxic substance to living organisms. Different organisms have developed different strategies to fix this problem from happening. Answer...
Which of the following options is correct? The insect wing, bat wing, and bird wing are A) analogous structures. B) homologous structures. Describe three members of the Class Aves (birds) found in the desert biome. Be sure to give...