At the individual level C. At multiple levels including genetic, individual, population and species levels D. Only in response to E. nvironmental changes 相关知识点: 试题来源: 解析 C。解析:根据现代综合进化论,进化发生在多个层面,包括基因、个体、种群和物种层面。不仅仅发生在物种层面,A选项错误;...
In evolutionary biology, the theory of group selection posits that natural selection occurs at the group level, and thus can influence the evolution of soc... OT Eldakar - American Cancer Society 被引量: 0发表: 2015年 SELFISHNESS, ALTRUISM AND SOCIAL DILEMMA Selfishness and competition and the...
Nematodes are the most abundant animals on earth1. At least a third of the human population is infected with a nematode at any given time2. Phylogenetic analyses have resolved nematode species into five broad clades with parasitic representatives in each3,4. Nematodes can be free-living, likeCa...
In this paper, we consider a long time and vanishing mutations limit of an integro-differential model describing the evolution of a population structured with respect to a continuous phenotypic trait. We show that the asymptotic population is a steady-state of the evolution equation without mutations...
Whole chromosome and arm-level copy number alterations occur at high frequencies in tumors, but their selective advantages, if any, are poorly understood. Here, utilizing unbiased whole chromosome genetic screens combined with in vitro evolution to generate arm- and subarm-level events, we iterativel...
However, to date, this example of human-induced evolution is poorly documented at the population level due to the lack of molecular tools. As such, important evolutionary and management questions, linked to the development and dispersal of pesticide resistance in this parasite, remain unanswered. ...
and also a small diversity in the within- and between-species level. Intraspecific cases with similarity greater than 50% and less than 80% were classified as the same superfamily, while interspecific cases with similarity greater than 50% were placed in the same group, which was further subdivi...
(Smith2010a,b). This confusion starts with the word “evolution” itself, which is frequently used to refer to both descent with modification/common ancestry (DWM) and mechanisms by which this occurs (mainly natural selection). The term “Darwinism” is similarly used ambiguously (Mayr1986; ...
Cumulative cultural evolution, the accumulation of sequential changes within a single socially learned behaviour that results in improved function, is prominent in humans and has been documented in experimental studies of captive animals and managed wild
This amplification-mediated gene expression tuning (AMGET) occurs on timescales that are similar to canonical gene regulation and can respond to rapid environmental changes. Mathematical modelling shows that amplifications also tune gene expression in stochastic environments in which transcription-factor-...