Ans-
Three environmental factors influence colony morphology include
nutrient availability, temperature and incubation time.
1. Nutrient availability- The different types of media contain
different nutrients can influence the bacterial colony.
2. Temperature- Colonial morphology is also influenced by the
temperature because some bacteria grow at body temperature and some
grow at low temperature. Some bacteria produce certain pigment at
some temperatures than at others.
3. Incubation time- The colony morphology such as colony size is also influenced by time of incubation.
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