The Calvin cycle (also known as the Calvin-Benson cycle or the carbon fixation cycle of photosynthesis) consists of a series of biochemical processes that are carried out in the stroma of the chloroplasts of photosynthetic organisms.
The reactions of the Calvin cycle belong to the so-called independent phase of light, which is responsible for fixing the CO2, incorporating it into the organic matter of the individual in the form of glucose by means of the RuBisCo enzyme. It should be noted that this set of reactions is mistakenly called the dark phase, since many of the enzymes in the process, including RuBisCo, depend on the activation of the ferredoxin-thioredoxin system, which is only found in its active form (the reduced one) in the presence of the light.
Some living thing's bodies are weaker than others. For the species to live, the strong ones of the species will not get sick, reproduce and create strong offspring. The weak will die out.
The choice that is true of the energy that is passed from one trophic level to the next in a food chain is about 10% of the energy passed from one level to the next is released as heat. The correct answer is A.