Search results
Results from the WOW.Com Content Network
Carbon on Earth naturally occurs in two stable isotopes, with 98.9% in the form of 12 C and 1.1% in 13 C. [1] [8] The ratio between these isotopes varies in biological organisms due to metabolic processes that selectively use one carbon isotope over the other, or "fractionate" carbon through kinetic or thermodynamic effects. [1]
The following is a breakdown of the energetics of the photosynthesis process from Photosynthesis by Hall and Rao: [6]. Starting with the solar spectrum falling on a leaf, 47% lost due to photons outside the 400–700 nm active range (chlorophyll uses photons between 400 and 700 nm, extracting the energy of one 700 nm photon from each one)
Photosynthesis usually refers to oxygenic photosynthesis, a process that produces oxygen. Photosynthetic organisms store the chemical energy so produced within intracellular organic compounds (compounds containing carbon) like sugars, glycogen , cellulose and starches .
The sole documented case of such an incident, written in 1997, has been heavily criticized upon peer review, and this phenomenon is now largely considered a myth. [80] Pacus, South American fish related to piranhas, do not attack or feed on human testicles.
Mali, Burkina Faso and Niger will have a six-month grace period after their scheduled exit from West Africa's main political and economic group next month during which the ECOWAS bloc will try to ...
The questions date beyond this season involving a defense allowing a combined 500 yards rushing in Buffalo being eliminated in each of the past three divisional playoff rounds.
CHICAGO, Illinois (Reuters) -Federal Reserve officials appear more likely to cut rates this month after data showed the U.S. labor market remained strong but continued to cool in November, with a ...
The Purple Earth Hypothesis (PEH) is an astrobiological hypothesis, first proposed by molecular biologist Shiladitya DasSarma in 2007, [1] that the earliest photosynthetic life forms of Early Earth were based on the simpler molecule retinal rather than the more complex porphyrin-based chlorophyll, making the surface biosphere appear purplish ...