Human's preference for facial symmetry may be related to which of the following? Teach about natural selection: In this lesson for the high school and college levels, students become unwitting subjects in a demonstration of natural selection. In biology, evolution is the change in the inherited traits of a population from generation to generation. Drawing on what you've read and viewed in this session so far, summarize your answers to these questions: What advantages did each provide and why might they have been favored by natural selection? Answer Save. Few people have the tenacity of ecologists Peter and Rosemary Grant, willing to spend part of each year since 1973 in a tent on a tiny, barren volcanic island in the Galapagos. Natural selection can take many forms. Evolution can occur within an individual during its lifetime. Physical features associated with attractiveness may be a sign of health and fertility. Bipedalism, Bigger Brains, and Natural Selection. Bipedalism is a form of terrestrial locomotion where an organism moves by means of its two rear limbs or legs.An animal or machine that usually moves in a bipedal manner is known as a biped / ˈ b aɪ p ɛ d /, meaning "two feet" (from the Latin bis for "double" and pes for "foot"). There is some debate about where this human ancestor arose, some favoring Africa and others Asia; cf. Having dark skin in more northern latitudes is potentially harmful because: Dark skin evolved in people living near the equator: to protect the body from losing too much folate. Learn vocabulary, terms, and more with flashcards, games, and other study tools. The culture of a human group is a suite of shared traditions that together are unique compared to other groups. the second is concerned with development of behavior. The Foraging Hypothesis suggests that large brains and increased cognition may Primates retain some primitive traits that evolved long ago in their vertebrate ancestor, such as: Five digits on hands and feet and Clavicle or collar bone. Individuals with this allele have higher fitness and are more likely to … Hominins did not consciously become bipedal for a specific reason. Standing up allows you to see over long grass to scan for predators and prey. In most primate groups and nearly all other mammals, males are dominant over females. the multiregionalism debate below. Food availability on the ground may have driven bonobos to live in more cohesive groups centered on females with less violence. Candidate ancestral adaptations include monkey-like arboreal or terrestrial quadrupedal- “Radiator theory”: Natural selection favored bipedalism in open environments because it decreases exposure to the sun and helps keep the brain cool. Natural selection may also ... A bipedal postural feeding adaptation may have been a preadaptation for the fully realized locomotor bipedalism apparent in Homo erectus. the third deals with evolutionary history of the Organism. Modern human life history is not very different from that of other primates. 11/1/2020 CH 10 REVIEW QUIZ: Fal20 ANTH 001 #76279 PHYSICAL ANTHROPOLOGY-Online 7/7 1 / 1 pts Question 10 Why might bipedalism have been favored by natural selection? Skin color got darker as early humans moved out of Africa into more northern latitudes. The earliest australopithecines were carnivorous. Being upright increased the distance from the ground so it gave them better vision of possible predators. What is the sequence of biological and cultural development in hominids? 246-248). A possible explanation for the high incidence of step-child abuse in humans. Considering the fact that humans live in large groups of unrelated individuals, humans are extraordinarily violent and lack basic cooperation. An erect posture helped maintain a cooler body temperature. Human life history is similar to other primates in which of the following ways? Why is it more prevalent in column 2, which shows the same DNA region in the same population after many generations? 3 Answers. Outline three reasons natural selection may have favored bipedal locomotion in the hominin lineage. Males have lower reproductive potential so they are more selective in choosing mates. These capabilities, in turn, favored early humans that had larger brains, hence more advanced linguistic and cognitive abilities. Humans are more closely related to which of the following groups? Among humans, males in general will prefer females with high reproductive potential. The ‘language-brain coevolution’, as suggested by the name, is CO-evolution, so it works in both directions: language evolves to adapt to its environment, i.e. This was a great advantage as they migrated long distances and created new habitats in new areas. Primates primarily evolved in which of the following habitats? Excessive sunlight depletes the amount of folate in the blood. Many theories, from Morgan's aquatic ape hypothesis (1982) to Lovejoy's carrying hypothesis (1981), have created scenarios in the form of evolutionary narratives about how bipedalism might have produced a specific selective advantage. “Radiator theory”: Natural selection favored bipedalism in open environments because it decreases exposure to the sun and helps keep the brain cool. All primates have long legs for bipedalism. Natural selection may also ... A bipedal postural feeding adaptation may have been a preadaptation for the fully realized locomotor bipedalism apparent in Homo erectus. a. Bipedalism freed the hands to carry things. What experiences, social and physical, across an individual's life span contributed to exhibition of particular behavior. Explain why the conjunction of long haplotype length and high frequency indicate alleles that have been recently favored by natural selection. Bipedal specializations are found in Australopithecus fossils from 4.2-3.9 million years ago, although Sahelanthropus may have walked on two legs as early as … When did absolute brain size begin to increase in the human lineage? Humans share which of the following features with all other primates? The evolution of human bipedalism, which began in primates about four million years ago, or as early as seven million years ago with Sahelanthropus, or about 12 million years ago with Danuvius guggenmosi, has led to morphological alterations to the human skeleton including changes to the arrangement and size of the bones of the foot, hip size and shape, knee size, … Evaluate Part A: Bipedalism, Bigger Brains, and Natural Selection. 2011). The only way that non-human primates locomote is by swinging through the trees with their arms. 2003). This would have been a useful advantage in scavenging for food and watching for big cats and other predators in … There have been two questions regarding bipedalism: i) ... have lasted through natural selection out of the . Favorite Answer. Which of the following statements are possible reasons why bipedalism was favored by natural selection?-it frees the hands to carry things-bipedalism favored bigger brains-standing upright maximized reproductive potential-it allowed for efficient picking of fruit from trees-an erect posture helped maintain cooler body temperatures Human language may have evolved from primate gestural behavior. If you take body size into consideration, human brains are not any bigger than the brains of other primates. Symmetrical faces may indicate genetic and physical health. Remember to use terms from text and lecture. In each case, explain why hominins became bipedal but other terrestrial primates, such as baboons, did not. 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