individuals are not affected by their surroundings 相关知识点: 试题来源: 解析 B。解析:文章中说“Natural selection occurs when individuals with certain traits are more likely to survive and reproduce.”自然选择发生在具有某些特征的个体更有可能生存和繁殖的时候。反馈 收藏 ...
Natural selection is a process that occurs because every environment contains challenges for the organisms that live within it. As a result of variation in the population, some individuals are better suited to deal with these challenges than others. The ...
题目Evolution occurs through natural selection. This means that organisms with traits that are beneficial for survival are more likely to ___. A. reproduce B. disappear C. stay the same D. change quickly 相关知识点: 试题来源: 解析 A。本题考查动词词义辨析。“reproduce”表示“繁殖”;“disappe...
百度试题 结果1 题目Evolution occurs through ___ selection. A. natural B. artificial C. accidental D. random 相关知识点: 试题来源: 解析 A。根据文章内容可知进化是通过自然选择发生的。反馈 收藏
Sexual Selection.—Inasmuch as peculiarities often appear under domestication in one sex and become hereditarily attached to that sex, the same fact probably occurs under nature, and if so, natural selection will be able to modify one sex in its functional relations to the other sex, or in re...
Natural selection occurs when individuals with certain genotypes are more likely than individuals with other genotypes to survive and reproduce, and thus to pass on their alleles to the next generation. As Charles Darwin (1859) argued inOn the Origin of Species, if the following conditions...
Theory shows how sexual selection can exaggerate male traits beyond naturally selected optima and also how natural selection can ultimately halt trait elaboration. Empirical evidence supports this theory, but to our knowledge, there have been no experime
But the disease occurs only in those who have two copies of the gene for the disease-causing haemoglobin (one copy from each parent). Those who have only one copy have no symptoms. They are, however, protected against malaria, one of the biggest killers in that part of the world. Thus...
thus conferring protection againstP. vivaxmalaria, and it occurs at a prevalence of 100% throughout most of sub-Saharan Africa yet is virtually absent outside of Africa. Moreover, throughconvergent evolution, an independent mutation inFYthat decreases this gene's expression has also become prev...
Differentiation perspectives therefore acknowledge the clarity and consistency of the integration perspective on culture – but suggest that this only occurs within sub-cultures and that even there we find inconsistency. Another interpretation suggests that cultures are ambiguous, even fragmented (Martin, 19...