搜索结果: 16-30 共查到“国际动态 生物进化论”相关记录112条 . 查询时间(3.361 秒)
科学家构建了哺乳动物进化树中的更多分支（图）
科学家 哺乳动物 进化树 更多分支
2019/12/19
近日，在一项发表在PLOS Biology杂志上的新研究中，美国耶鲁大学的研究人员公布了一项对物种数据收集和分析方法的全面改革，以构建哺乳动物的生命进化树。该研究的目的是为科学家、动物保护管理者、政策制定者和环保主义者提供关于物种多样性过去与现在关系的更准确更全面的信息。该研究第一作者、耶鲁大学生态学与进化生物学博士后研究员Nathan Upham说：“我们使用的化石和基因组数据往往是残缺和混乱的...
动物性染色体改变的分子进化动力学
动物性 染色体 分子进化动力学
2019/12/19
近日，奥地利科学技术学院助理教授Beatriz Vicoso在Nature Ecology & Evolution上发表了题为“Molecular and evolutionary dynamics of animal sex-chromosome turnover”的文章，揭示了动物性染色体改变的分子进化动力学。性染色体，如哺乳动物的X和Y，在许多动物和植物物种中参与性别决定。性染色体的进化不同...
Colorful bird feathers offer evolutionary clues（图）
Colorful bird feathers evolutionary clues
2019/11/22
Researchers at the University of Arizona (UA) and other institutions have discovered a new twist on the idea that evolution is driven by species interactions in a community. The results are published ...
Colorful bird feathers offer evolutionary clues（图）
Colorful bird feathers evolutionary clues
2019/11/22
Researchers at the University of Arizona (UA) and other institutions have discovered a new twist on the idea that evolution is driven by species interactions in a community. The results are published ...
Social Susceptibility（图）
Social Susceptibility
2018/1/10
This is the story of a spider, small but bold.This particular arachnid, in fact, has helped to debunk the Great Man Theory, a 19th-century notion positing that highly influential individuals use their...
New Approach Measuring Early Butchering Practices Can Help Answer Questions About Evolution（图）
Measuring Early Butchering Practices Answer Questions About Evolution
2017/12/19
Researchers, led by a Purdue University anthropology professor, have found that statistical methods and 3D imaging can be used to accurately measure animal bone cut marks made by prehistoric human but...
Pumpkin genomes sequenced revealing uncommon evolutionary history（图）
Pumpkin genomes sequenced evolutionary history
2017/11/23
For some, pumpkins conjure carved Halloween decorations, but for many people around the world, these gourds provide nutrition. Scientists at Boyce Thompson Institute (BTI) and the National Engineering...
Rethinking Well-being and Sustainability Measurements from Local to Global Scales（图）
Rethinking Well-being Sustainability Measurements Local Global Scales
2017/10/26
A new study suggests that standard ways of measuring well-being and sustainability in communities used by global organizations may be missing critical information and could lead to missteps in managem...
Where Food Is Limited,Guppy Mothers Gestate Their Young Longer（图）
Food Is Limited Guppy Mothers Gestate Young Longer
2017/10/25
Trinidadian guppy mamas can’t swap links to maternity blogs or copies of pregnancy books, yet evolution has made them master strategists of childbearing nonetheless. A new study shows that guppies who...
Birds of a Feather
Birds Feather
2017/7/21
Biologists have always been fascinated by the diversity and changeability of life on Earth and have attempted to answer a fundamental question: How do new species originate?Today, an implicit assumpti...
Outnumbered and on Others’ Turf,Misfits Sometimes Thrive
Outnumbered Others Turf Misfits Sometimes Thrive
2017/7/21
It’s hard being a misfit: say, a Yankees fan in a room full of Red Sox fans or a vegetarian at a barbecue joint. Evolutionary biologists have long assumed that’s pretty much how things work in nature ...
英国研究人员29日在《皇家学会生物学分会学报》上发表报告说，他们通过化石分析发现，人类祖先在恐龙灭绝后1000万年中的进化速度是恐龙灭绝前8000万年里一直所保持速度的3倍。学术界一个比较普遍的观点是，恐龙出现在约2.4亿年前，灭亡于约6600万年前的一次大规模物种灭绝事件中。这次大灭绝事件可能是一颗小行星撞击地球造成的，当时的绝大部分动植物灭绝，对后来的地球环境产生了深远影响。
人们目前相信，大猿类（包括人类）在约1700万年前与小体型猿在进化上分道扬镳，但对一个较新化石（它同时具有这两类猿的特征）的分析可能会重塑我们对这一演化路径的理解。狭鼻猿是一组灵长类动物，它们生活的时间在旧世界猴与猿在演化上相互分开之前，而后者又进一步分化为小体型猿类和大猿类。某些研究者认为，小体型猿类是大猿类的矮化版本，因为这组猿缺乏狭鼻猿的特征。然而2011年1月在西班牙加泰罗尼亚发现的一个被...
Usual prey gone, a fish survives by changing predictably
prey gone fish survives changing predictably
2015/3/18
CLEVELAND—A species of fish that normally eats smaller fish changes in predictable ways when isolated from its prey, research led by a Case Western Reserve University biologist found.Without the Baham...
100 million year study shows a sheltered start breeds evolutionary success（图）
a sheltered start breeds fish family trees
2014/7/4
Research into reef fish species diversity will provide conservationists with new information to protect the Great Barrier Reef.