搜索结果: 1-4 共查到“动物学 6.5 million years”相关记录4条 . 查询时间(0.015 秒)
Unraveling arthropod genomic diversity over 500 million years of evolution（图）
arthropod genomic diversity 500 million years evolution
2020/2/20
Comparative analyses by scientists at the Swiss Institute of Bioinformatics and other institutions of 76 arthropod species spanning 500 million years of evolution reveal genomic changes that point to ...
Caribbean bat species need 8 million years to recover from recent extinction waves
Caribbean bat 8 million years recover recent extinction waves
2017/2/15
Find related stories on NSF's Environmental Research and Education and Dimensions of Biodiversityprograms.How long does it take a community of mammals to recover after a wave of species...
Tooth Loss in Birds Occurred About 116 Million Years Ago
Tooth Loss in Birds 116 Million Years Ago
2014/12/30
RIVERSIDE, Calif. — The absence of teeth or “edentulism” has evolved on multiple occasions within vertebrates including birds, turtles, and a few groups of mammals such as anteaters, baleen whales and...
Hummingbird evolution soared after they invaded South America 22 million years ago
Hummingbird evolution soared after they invaded South America 22 million years ago
2014/4/16
The National Science Foundation (NSF) is an independent federal agency that supports fundamental research and education across all fields of science and engineering. In fiscal year (FY) 2014, its budg...