Archaeologists investigating prehistoric agriculture often analyze phytoliths—microscopic silica bodies that precipitate inside plant tissues and persist in soil long after organic matter has decomposed. Unlike pollen grains, which are easily transported over tens of kilometers by wind, phytoliths typically enter the sediment immediately where the plant decayed or was processed. Consequently, the presence of high concentrations of crop-specific phytoliths within an excavation stratum indicates localized plant processing or consumption rather than regional vegetation patterns.
Which of the following statements is most strongly supported by the passage?
- AOrganic matter from prehistoric crops generally resists decomposition as effectively as silica structures do.
- BPhytolith analysis cannot detect any plant species that grew prior to the emergence of human agriculture.
- Pollen grains found in an archaeological stratum provide less reliable evidence than phytoliths regarding the exact localized site where a specific plant was processed.Answer
- DAtmospheric wind currents serve as the primary mechanism responsible for dispersing phytoliths across prehistoric settlements.
- EMicroscopic analysis of pollen grains is the most frequently utilized botanical method in contemporary archaeology.
Answer
Pollen grains found in an archaeological stratum provide less reliable evidence than phytoliths regarding the exact localized site where a specific plant was processed.
The statement indicating that pollen grains are less reliable than phytoliths for identifying exact localized processing sites directly follows from the passage's explicit contrast: pollen is transported over tens of kilometers by wind, whereas phytoliths enter the sediment immediately where the plant was processed or decayed.
Step-by-Step Solution
Key Concept
Drawing a direct comparative inference between two mechanisms described in the text based on their differing physical properties.
Estimated Time:1m 0s