The morphological variation (including skin color) observed between geographic populations in our species is a result of… Group of answer choices natural selection and evolutionary adaptation to different environments regional technological advances of the Upper Paleolithic acclimatization to different environments the internal physiological mechanisms involved in homeostasis cultural evolution in different regions of the world

Earth’s history is divided into unequal time intervals.  The boundaries between the intervals mark significant geological (very early Earth) or evolutionary events on Earth’s history.  Example: The boundary between the Precambrian eon and the Phanerozoic eon is marked by the rapid evolution and diversification of organisms with hard body parts.  The time intervals are eons, which are subdivided into eras.  The eras are subdivided into periods.  The periods are further subdivided into epochs (not shown on figure).   What is our current eon ______________, era _______________, and period _______________   Age boundary between the Hadean eon and Archean eon __________________   Age boundary between Archean eon and Proterozoic eon __________________   Age boundary between Proterozoic eon and Phanerozoic eon ________________   Age boundary between Paleozoic era and Mesozoic era ____________________   Age boundary between Mesozoic era and Cenozoic era ____________________   What…

Explain the difference between macro and microevolution including how (or if) either (or both) are reflected in the fossil record.  Also, within your explanation provide examples of each. Explain the early ideas/foundations/paradigms of the theory of evolution.  Be specific and thorough with your answer. Describe the 'evolution of the idea of natural selection.  Be specific and thorough with your answer. Describe the conditions or circumstances when organic material (i.e. living things) would not be preserved.

Evidence for biocultural evolution during the Upper Pleistocene may exist in the form of craniofacial morphological differences between premodern humans and modern humans because, as one interpretation mentioned in your text suggests… Group of answer choices deep concentration on the creation of cave art murals resulted in the selection for more gracile craniofacial morphology in modern humans hunter gatherers used landscape surveying methods to hunt and gather resources, a practice that required long periods of squinting resulting in supraorbital browridge muscle robusticity frequent spiritual rituals focused around chanting practices resulted in enlarged craniofacial muscle attachments basket weaving techniques required the use of the teeth as a clamp to temporarily hold the sinew technological innovations assisting with food processing resulted in anatomically modern humans not needing large teeth and facial muscles to chew and process their foods