At first, it was thought that the Earth's atmosphere consisted of hydrogen compounds—methane, ammonia and water vapour—and that life began under such reducing conditions, which are conducive to the formation of organic molecules
<span>Answer: "abdominal aortic aneurysm" .
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This is an 8th grader question. But I'll say Xx Xy
The region of the body that will be examined is the EPIGASTRIC REGION.
The epigastric region refers to the upper central region of the abdomen. Its exact location is in-between the coastal margin and the sub - coastal plane.
From the cladogram, we can tell that the ancestral species most likely had a vertebral column.
<h3>What is a cladogram?</h3>
The cladogram is a branched diagram that can be used to show the relationship between organisms. It can also be used to decode evolutionary relationships.
As such, from the cladogram, we can tell that the ancestral species most likely had a vertebral column.
Learn more about a vertebral column:brainly.com/question/8053940
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