Answer:
- colony: mass of single-type cells formed from single cell/small chain; pair or small cluster of cells; visible to naked eye
- colony forming unit: not visible to eye, original single cell or small chain/pair or small cluster of cells FROM WHICH colony forms
- Streaking plate: producing isolated colonies upon incubation using streak plate methods in agar
- Quadrant streak: used when sample is of high density
- Zigzag pattern: used when sample is of low density