Which set of stages is listed as part of the biological growth cycle?

• A. Polymerization
• B. Growth by photosynthesis only
• C. Lag- no growth; accelerated growth; log growth; stationary
• D. Accelerated death

Answer: (C)

Biological growth in microbial populations unfolds in stages: cells first adjust to their environment with little division (lag), then divide rapidly (exponential or log growth), then slow as resources become scarce (stationary), and finally decline if conditions stay unfavorable (death). The set that lists Lag, accelerated growth, log growth, and stationary matches this sequence, with accelerated growth representing the exponential phase and log growth another common label for that same stage. The other options don’t describe a natural sequence of growth phases: polymerization isn’t a growth stage, growth by photosynthesis only describes a metabolic mode rather than a growth-phase sequence, and accelerated death refers to decline rather than growth.