Archaeologists studying early agriculture often struggle to identify crop cultivation sites because soft plant tissues decay rapidly in humid climates, leaving little organic material behind. To overcome this limitation, researchers have increasingly relied on the analysis of phytoliths—microscopic silica structures that form inside plant cells and persist in soil for millennia. By extracting these durable microfossils from sediment samples at the Xihuano site in Ecuador, researchers successfully identified distinct structural variations characteristic of domesticated squash. Consequently, this methodology not only confirmed early cultivation at the site but also enabled researchers to construct a more precise timeline of agricultural development in the region.
Which choice best describes the overall structure of the text?
- It identifies a research challenge, introduces a method used to address that challenge, describes a specific application of this method, and explains the wider implications of the findings.Answer
- BIt outlines a traditional archaeological theory, presents evidence that contradicts it, proposes an alternative theory, and calls for further research to validate this new theory.
- CIt describes a specific archaeological discovery, details the chemical composition of the artifacts found, and compares these artifacts to others found in the same region.
- DIt presents a hypothesis about ancient agricultural practices, describes an experiment designed to test that hypothesis, and argues that the experimental results are inconclusive.