Describe the path of the electron beginning from one molecule of water and passing through all of the light reactions in photosynthesis

How did the discovery of the rhesus factor affect society? o more patients died from having a transfusion with the wrong rhesus factor 0 new treatments during pregnancy could prevent harm to the developing child. o less donated blood could be used in the treatment of patients. the number of blood types was reduced by half

What does polymerase chain reaction (pcr) do? o a. separates dna fragments by size o b. cuts a dna sample into fragments o c. provides an overall picture of a person's chromosomes o d. makes more copies of a sample of dna

There are fewer than 100 naturally occurring elements in the universe, but there are millions of different unified substances. explain how this can be true.