They evolved in Africa and they include anatomically modern humans such as ourselves and our ancestors such as Homo erectus and Homo habilis.Answer and Explanation: Humans could have evolved from amphibians. This is because amphibians were the first vertebrates on land and reptiles thus evolved from...
Humans are notoriously different frombirds. They belong to another evolutionary branch, and as such, they have very little in common with creatures like us. However, it is worth speculating on what would have happened if birds had evolved as the dominant species instead of humans—with the resu...
Tens of thousands of years ago, our ancestors sought out wild canines with a frisky streak that lives on in modern dogs—particularly herding and hunting breeds.
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pigeons are often seen as dirty birds and an urban nuisance but they are just the latest in a long line of animals that have been found to have abilities to help humans. 2017年12月四级真题(第一套)阅读 Section A Rats are often associated with spreading disease rather than preventing it, ...
Though studies on ΔT in male birds certainly outnumber those in females, research with birds has been key to elucidating the evolved role of T in females (Ketterson et al. 2005). As in males, cues from a partner are important for ΔT in females. Female canaries showed higher androgen ...
Furthermore, what makes the virus transmissions between humans and animals particularly worrisome also centres on the fact that these transmissions often indicate potential virus mutations—the virus has evolved to the extent that it has the potential to transmit between species, rather than among ...
They also compared the prefrontal cortex inmammals, which is important for complex thought such as decision making, with the nidopallium caudolaterale, which has a similar role in birds. They discovered that despite both hub nodes having evolved differently, the way they are wired up within the...
We describe mechanisms of sperm competition in in- sects and in birds. We suggest that the adaptive prob- lems and evolved solutions in these species provide insight into evolved human sexual behaviors and psy- chology. We review recent theoretical and empirical arguments for the ex...
Walking independently evolved several times in fish, making it an example of evolutionary convergence (similar traits that evolve independently,like wings in bats and birds). The evolution of walking in fish is rare though. There are more than 30,000 species of fish as we know them today (not...