Define positive feedback and systems and explain how positive feedback is responsible for the loud screeching noise that is heard when a microphone gets too close to a speaker

When does dna replication(make a copy of itself)?

Explain nonnuclear inheritance. ~ ap biology

Ronald wants to see if a new shower cleaner works better in removing soap than his old cleaner. he uses the new cleaner on one half of the shower tiles and his old cleaner on the other half. identify the independent and dependent variables in this experiment. enter your answer in the space provided.