Question

read the abstract below. is it from a review or a primary research article?oxygenic phototrophs have played a fundamental role in earths history by enabling the rise of atmospheric oxygen ($o_2$) and paving the way for animal evolution.understanding the origins of oxygenic photosynthesis and cyanobacteria is key when piecing together the events around earths oxygenation. it is likely that photosynthesis evolved within bacterial lineages that are not extant, so it can be challenging when studying the early history of photosynthesis. recent genomic and molecular evolution studies have transformed our understanding about the evolution of photosynthetic reaction centres and the evolution of cyanobacteria.the evidence reviewed here highlights some of the most recent advances on the origin of photosynthesis both at the genomic and gene family levels.sánchez-baracaldo, patricia, and tanai cardona. \on the origin of oxygenic photosynthesis and cyanobacteria.\ new phytologist, vol. 225, no. 4, 2020, pp. 1440-1446.$\bigcirc$ primary research article$\bigcirc$ review article

Explanation:

The abstract explicitly states it "highlights some of the most recent advances" and reviews existing evidence and studies on the topic, which is the core characteristic of a review article, rather than presenting original primary research data.

Answer:

O Review article