Homo sapiens

about human evolution focuses on whether Homo sapiens have a single origin, the Recent African Origin (RAO) model, or if they originate from multiple regions, the multiregional (MRO) model (3). The RAO model finds its origin in Darwin's 'The Descent of Man', published in 1871, where he hypothesizes that humans descent from a single species that resided in Africa (4). Today, the RAO model suggests that all non-African populations have a common Homo sapiens ancestor from the African regions that evolved

1. At the center of kin selection is altruism. This behavior is very difficult to understand from an evolutionary perspective since the behavior increases the fitness of another while decreasing the actor’s fitness. An individual possesses their direct fitness, which results from the reproductive potential of the individual itself, and indirect fitness. Indirect fitness is the additional fitness gained by relatives due to an individual’s actions. In kin selection, improving the survival and reproductive

incorrect. The two species evolved separately. Chimpanzees have never been a part of the genus homo, and humans have never been a part of the genus pan. Instead, humans have evolved over a long period of time from species that have died off a long time ago. There are many known species of hominids that lived before the first known species that belongs to the genus homo. These hominids, while not in the genus homo, are known to be some of the earliest known ancestors to modern day primates, including humans

1. Which are more closely related to crocodiles: birds or lizards? Explain. Birds are closely related to crocodiles because they share the same ancestry with the dinosaurs. To compare the crocodile and lizard, one would think the lizard is closely related to crocodiles, as we read in our text, "similar structures don't always reveal common ancestry." Crocodiles and birds evolved having the same common ancestry as the dinosaur. Lizards, on the other hand, do not share a close common ancestor with

understanding of any species’ behavior includes possessing comprehensive knowledge of their respective sensory world. Here we attempted to determine the sensory threshold for a response to sweetness in both the flesh fly Sarcophaga bullata and Homo sapiens. Flies and humans alike were exposed to increasingly concentrated solutions of glucose and monitored for a positive response, indicative of the detection of sweetness. Results from our experiment strongly indicate the population threshold for sweetness

creature rather than the microcephalic Homo Sapiens. Firstly, the body structure varies considerably. The size of the recovered skeleton reveals that the Homo Floresiensis is equivalent to a three-year-old modern human measuring about three foot (Luar). Secondly, the brain size is small than Homo Sapiens's one at about 400cc compared to modern being's 1500cc (Luar). Considering the standard evolution theory of Australopithecus, Homo Habilis, Homo Erectus, and Homo Sapiens, the brain size has more than tripled

more primitive qualities. "They are not just like us," said Jean-Jacques Hublin, one of the scientists reporting the find. But they had "basically the face you could meet on the train in New York." The Moroccan fossils unearthed suggest that Homo sapiens may have experienced our own one in any place in Africa, said Hublin, of the Max Planck Institute for Evolutionary Anthropology in Leipzig, Germany, and the College

no specimens have been discovered, suggesting that some modern human populations in Africa have genetic material from extinct archaic African hominins, as well as some distinct basal western African population lineages (). Neanderthals, known as Homo neanderthalensis and modern humans not only are known to share similar DNA, but they also share a similar language. The FOXP2 gene is the first gene to be involved in the formation of speech and language (Lai et al., 2001). The FOXP2 gene was initially

“Home Floresiensis - The Hobbit” Homo floresiensis (“Man of Flores”) is the name for a possible new species in the genus Homo, remarkable for its small body, small brain, and survival until relatively recent times (www.en.wikipedia.org). Anthropologists Peter Brown of University of New England in South Wales, Australia, Michael Morwood and their colleagues have argued that a variety of features, both primitive and derived, identified LB1 (the first skeleton found in cave of Liang Bua) is

Everything as we know it all started with a bang literally, it formed planets, stars, and even life forms. When it comes to mankind however, we are relatively new to the universe despite most people's beliefs that the universe revolves around us. Without bringing religion into the mix, “all people originated from apelike ancestors and evolved over a period of approximately six million years"(human origins) which is quite some time compared to our life span. As we evolved we adapted and became smarter