Uncommon Descent Serving The Intelligent Design Community


Another issue re the origin of plants between 3.4 and 2.9 billion years ago…

Timothy Standish: I couldn’t help but notice that the time photosynthesis is supposed to have evolved doesn’t line up with either the time when oxygen is supposed to have become an important element in the atmosphere, half a billion years later, or the time that fixed carbon begins showing up in the fossil record, which is much earlier, possibly over half a billion years. Read More ›

Researchers say they have a “precise estimate” for the time of origin of photosynthesis

Botanist Margaret Helder writes to comment “The point to reflect on is what all those heterotrophs did for food prior to the appearance of the autotrophs. Any organic molecules in the environment would be quickly digested if there were only organisms around with no capacity to reduce carbon.” Read More ›

Researchers: Cyanobacteria were an important part of marine ecosystems 1400 million years ago

Well then, how did a complex process like photosynthesis get the time to “evolve” by natural selection acting on random mutations (Darwinism)? Researchers (wisely, for now) state such findings without making any obvious inferences. But the number of these situations is building. Read More ›

If photosynthesis could really be as old as life itself…

Well, that’s good news for the hope of finding life on other planets! But researchers hoping to rush in and save Darwinism should know that if the earliest organisms could photosynthesize, an intelligent origin of life is virtually certain. Read More ›

Researchers: Photosynthesis may be a billion years older than thought … But WAIT!

“Dr Cardona also suggests that this might mean oxygenic photosynthesis was not the product of a billion years of evolution from anoxygenic photosynthesis, but could have been a trait that evolved much sooner, if not first.” So when did the billions of years of Darwinian evolution that “gradually evolved” photosynthesis happen? Read More ›

Researchers build public “library” to help understand photosynthesis

From ScienceDaily: It isn’t easy being green. It takes thousands of genes to build the photosynthetic machinery that plants need to harness sunlight for growth. And yet, researchers don’t know exactly how these genes work. Now a team led by Princeton University researchers has constructed a public “library” to help researchers to find out what each gene does. Using the library, the team identified 303 genes associated with photosynthesis including 21 newly discovered genes with high potential to provide new insights into this life-sustaining biological process. The study was published online this week in Nature Genetics. “The part of the plant responsible for photosynthesis is like a complex machine made up of many parts, and we want to understand what Read More ›

Many plankton behave like both plants and animals, challenging biological concepts

Tales from the Tree Bundle of Seedlings, or maybe best called Web of Life: Traditionally, marine microplankton had been divided similarly to species on land. You had plant-like phytoplankton, such as algae, and animal-like zooplankton that ate the phytoplankton. What Stoecker found was that some of these organisms were somewhere in the middle: They could eat like animals when food was present and photosynthesize like plants in the light. “If you think about it, it can be the best of both worlds,” says marine ecologist Dave A. Caron of the University of Southern California. Today, there’s growing realization that these in-between beasties — dubbed mixotrophs — are not only widespread but also play vital roles in the ecology of the Read More ›