TLS Online TPP Program

#Question id: 12001


The  graph  below  shows  the  growth  rates  of  populations  of  bacteria  that  have  evolved  for  many  generations  at different culture temperatures (25°C, 30°C, and 35°C). Each population grows over only a limited range of temperatures (its thermal niche), which are bounded by its critical thermal limits. Within this range, growth rate increases with temperature up to a maximal value and then declines rapidly with increasing temperature. Growth rates are known to be the major determinant of fitness for these bacteria.


Which population has the highest fitness at 25°C ? 

#Unit 10. Ecological Principles
  1. The population evolved at 25°C.
  2. The population evolved at 30°C. 
  3. The population evolved at 35°C.
  4. All populations are equally fit at this temperature.