the growth curve
- Created by: vezting
- Created on: 19-10-15 10:08
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- The growth curve
- metabolites
- primary: substance produced by an organism as part of its normal growth
- EG amino acids
- secondary: substances produced by the organism that are not part of its normal growth
- EG antibiotics
- primary: substance produced by an organism as part of its normal growth
- Lag Phase
- adjust to surrounding and conditions.
- population remains constant
- specific genes are activated and specific enzymes are synthesised.
- Log phase
- the population size doubles, growth is exponential
- length of the phase depends on how quickly the organism reproduces
- there is enough nutrients and space.
- stationary phase
- nutrient levels decrease and toxic waste and metabolites build up
- individuals die at the same rate of reproduction.
- decline/death phase
- there is a nutrient axhaustion
- increased toxic levels leads to death rate increasing above reproduction rate
- in a closed system all individuals will die
- metabolites
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