Question

If an organism has high biological fitness in one environment, does that mean that it would also have high biological fitness in another environment? Why or why not?

Answer 1

The answer is no, high biological fitness in one environment doesn’t have to be high in another environment.

Biological fitness is a term used in evolutionary biology and it is the quantitative representation of how a genotype (or phenotype) is successful (reproductively) in a certain environment. Fitness depends on environment so it changes if the environment changes. The fitness of a genotype is manifested through its phenotype, which is affected by the environment.