Recent Examples on the WebThat’s the crucial limit in which the rate of plant respiration exceeds that of oxygenic photosynthesis. Bruce Dorminey, Forbes, 28 Oct. 2021 Thus, geologists have been able to determine that these Jack Hills zircons were subject to oxygenic chemistry, suggesting that liquid water was already present on earth in abundance some 4.38 billion years ago, writes Knoll. Bruce Dorminey, Forbes, 15 Apr. 2021