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Nt1310 Unit 1 Assignment 2

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Assignment 2

Abdulaziz alkharfi

15. Is a form of type locomotion where an organism walks by means of its two rear limbs or legs.

16.This feature indicates that the head of Sahelanthropus was on an uppper body, probably working with walking on two legs. Because if we set the skull on ape body the eye will be toward the ground which make no sense.

17.Hominids evolved to walk upright in response to climate change. As forest getting smaller, hominid ancestors found themselves descending from the trees to walk across stretches of grassland that separated forest areas. The most efficient way is to walk on the ground was bipedally. Their food supplies were becoming more widely dispersed. and the forest was changing to more open grassland, with more distance between food resources. If our ape ancestors had to roam farther to find food, and doing so on two legs saved energy, then those who moved across the ground more economically gained an advantage.

18.The older layers of the earth are exposed here, so fossils of all ages can be found. The many layers of sediment show the changes that occurred in the environment as the layers of dirt built up over time.. Ash layers from nearby volcanic eruptions can be dated, providing a time line for changes in climate, plants and animals, and the ways of life of early humans. Selam’s …show more content…
The forehead of the chimpanzee receded to form a heavy browridge and a jutting jaw; while the Taung child's forehead move back, but leaves no browridge. The Taung child's foramen magnum is located below the cranium, showing that the creature stood upright. A sulcus of the cerebrum on the lateral part of the occipital lobe that marks the front boundary of the visual area. The lunate sulcus of Selam and Lucy, the furrow marking the vision structures, moved back, making more space for a larger neocortex, the thinking part of the brain. so that suggests, then, by australopithecine times, they were simply smarter than present-day

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