Choose the correct sequence of stages of growth curve for bacteria.
Correct answer: A. Lag, log, stationary, decline phase
- A. Lag, log, stationary, decline phase
- B. Lag, log, decline, stationary phase
- C. Stationary, lag, log, decline phase
- D. Decline, lag, log phase, stationary
Explanation
Lag, log, stationary, decline phase Here's an explanation of each stage: Lag Phase: In this phase, bacteria are adjusting to their new environment, and there is little or no increase in the number of bacteria. They are metabolically active but not yet dividing rapidly. Log (Exponential) Phase: This is the phase of rapid bacterial growth. The population of bacteria increases exponentially as they divide and reproduce under favorable conditions. Stationary Phase: In this phase, the growth rate slows, and the number of new bacteria being produced is roughly balanced by the number dying. Resources become limited, and growth plateaus. Decline Phase: Also known as the death phase, this is when the number of dying bacteria exceeds the number of new bacteria being produced. Conditions become unfavorable, leading to a decline in the bacterial population. The sequence "Lag, log, stationary, decline phase" represents the typical pattern of bacterial growth in a closed system with limited resources.
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Biological classification uses taxonomic ranks, binomial nomenclature and shared characteristics to organize life into kingdoms. The major groups include prokaryotes, protists, fungi, plants and animals, with comparisons based on cell type, cell wall, nutrition, body organization, reproduction and evolutionary relationships; prokaryotes lack a membrane-bound nucleus.
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