Help please.. Why do you think that diagnosing a parasite infection can be difficult in some cases? What factors would make it challenging?

the way that the mass of carbon can be conserved through cellular respiration is through a process/law called the law of conservation of mass which even tho it undergoes a process, mass is not be destroyed or changed

a physical change is being made.

i think that is new experiments yield untrustworthy data and should be carefully considered, because you don't know what will happen with the experiments.