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Covering all species from yeast to humans, "" is the first book to tell the story of selfish genetic elements, those continually appearing stretches of DNA... A Burt,R Trivers - 《Belknap Press》 被引量: 427发表: 2006年 Nonrandom segregation during meiosis: the unfairness of females Most ...
Hand proportions of humans are usually compared with those of apes using the thumb-to-digit ratio (or IHPs), which is a good functional measure of thumb opposability and therefore a proxy for manual dexterity (for example, refs 1,14,19). Accordingly, we queried our anthropoid sample (see...
"sweating allows that, and for sweat to be efficient you need to be mostly hairless". the meat from hunting animals gave early humans the energy to fuel their growing brain. humans are the sweatiest primates on earth. they have up ...
Sometimes, a mutation causes a vestigial trait to express itself more fully. This is known as anatavism. Humans are sometimes born with small tails. It's fairly common to findwhaleswith hind legs. Sometimes snakes have the equivalent of toenails, even though they don't have toes. Or feet....
She also explained that the human fossils at Huanlongdong belong to ancient humans with physical characteristics between the Homo erectus and modern human stages -- which is unlike any other premodern human fossil ever found. A skull fossil unearthed in 2015 is one of the most important discover...
of overheating. Being covered in hair prevented our ancestors from losing heat fast enough. So, as Peter Wheeler, of Liverpool John Moores University in the UK, explained, losing hair allowed them to develop the ability to sweat and therefore...
There is no single, universally agreed-upon set of guidelines for defining sex and gender. We offer the following guidance: Sex and gender-based analyses (SGBA) should be integrated into research design when research involves or pertains to humans, animals or eukaryotic cells. This should be do...
There is no single, universally agreed-upon set of guidelines for defining sex and gender. We offer the following guidance: Sex and gender-based analyses (SGBA) should be integrated into research design when research involves or pertains to humans, animals or eukaryotic cells. This should be do...
Most emerging and re-emerging infectious diseases stem from viruses that naturally circulate in non-human vertebrates. When these viruses cross over into humans, they can cause disease outbreaks, epidemics and pandemics. While zoonotic host jumps have be