Physical activity causes an increase in your heart rate. Your body have to change the way it behaves so you don’t get ill or sick or pass out during physical exertion
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Agriculture and domestication probably started in the Fertile Crescent (the Nile Valley, The Levant and Mesopotamia). ... People probably started agriculture slowly by planting a few crops, but still gathered many foods from the wild. People may have started farming because the weather and soil began to change.
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that aren't sex chromosomes ( dont know which one because there are not any answer choices)
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There are four principles at work in evolution—variation, inheritance, selection and time. These are considered the components of the evolutionary mechanism of natural selection.
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