Describe the relationship between the concentration of NAD^ + in the blood and the concentration of lactic acid in the blood during the first 5 weeks of treatment with the vitamin Based on Figure 2 , calculate the average rate of change in blood AND concentrations from week 5 to week 17​

b.have there own function.

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answer: collecting information/data

reason: the student is going around and asking people questions to collect data

i hope this

only about ten percent of the energy at one trophic level is passed on to organisms at the next trophic level. the remainder of the energy is used in life processes or lost as heat.