The purpose of the Calvin cycle is to fix . The Calvin cycle takes place in the . There are 3 steps to the Calvin cycle. In step 1, is fixed by an enzyme called Rubisco. Rubisco adds CO2 to RuBP to form 2 molecules of .

Which of the following observation darwin shape his concept of descent with modification? a) species diversity declines farther from the equator. b) fewer species live on islands than on the nearest continents. c) birds live on islands located farther from the mainland than the bird's maximum nonstop flight distance. d) south american temperate plants are more similar to the tropical plants of south america than to the temperate plants of europe. e) earthquakes reshape life by causing mass extinctions.