The final decision was that the findings with regard to the “effects of long-term heavy use” were, while worth “further investigation,” too unreliable to conclude they represented a clear and irrefutable increased risk. 因此,大家也没感到惊讶,这种分组方法显然过度解释了研究结果。所以,研究结果...
Although these changes later were found to be due to other rare events, the term was preserved [16]. In the 1920s, mutation research was reaffirmed by Muller who showed unequivocally that radiation was a mutagen [17]. In 1941, Alexander Hollaender's [18] contribution was noting that the ...
During the early 20th century the diverse practices of genetics were unified by the concept of the gene. This classical gene was simultaneously a unit of structure, function, mutation, and recombination. Starting in the 1940s, however, the classical gene began to fragment. Today when we speak ...
但还是有可 能。故选C。 5.D。细节理解题。定位词:humpback whale. Vancouver Island对应原文:第四段第三、四句:"In 1919, for example, a humpback whale with a pair of leg-like appendages over a metre long, complete with a full set of limb bones, was caught off Vancouver Island in Canada....
Roses have high cultural and economic importance as ornamental plants and in the perfume industry. We report the rose whole-genome sequencing and assembly and resequencing of major genotypes that contributed to rose domestication. We generated a homozygo
To solve the question "The gene theory was presented by," we will analyze the options provided and identify who first presented the gene theory.1. Understanding the Gene Theory: - The gene theory is a fundamental principle i
Forests are spatially and temporally dynamic, such that forest degradation is best quantified across whole landscapes and over the long term. The European Union’s forest degradation policy, which focuses on contemporary primary forest conversion to plantations, ignores other globally prevalent forestry pr...
He was—and still is—inclined to take a longer-term view. Not only did he regard buying a house as a top priority, but he also considered the education of his children as extremely important. Both of these provided him and his family with security. Only in very few cases did workers ...
The nature vs. nurture (培养) debate has gained mixed reactions from scientists and psychologists through the years. Some believe that genetics has a more significant impact on your physical, emotional, and mental qualities, while others say that your upbringing has a great influence on your matur...
Mendelstudiedgeneticsthroughplant-breedingexperimentswiththegardenpea,aplantspeciesthatisself-fertilizingandbreedstrue(eachoffspringisidenticaltotheparentinthetraitofinterest).Totesttheblendingtheory,hefocusedhisresearchonsevendistinctcharacters.Eachofthesecharacters,suchasseedcolorandplantheight,presentonlytwo,clear-cut...