Differential between the life cycle of saprophytic fungus (mucor) and parasite fungus (pythium)
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do you have a picture?

but there is no

i guess you forgot putting it.

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.

c should be the answer