Fitness is the quantitative representation of natural and sexual selection within evolutionary biology. It can be defined either with respect to a genotype or to a phenotype in a given environment.
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Answer:
strengths:The cell model shows all the process involved, and it's easy to understand, even if a person isn't familiar with the process
weaknesses: it doesnt show organelle or rna
<span>positive self talk is the best source of internal motivation.</span>
Alveoli are found in lungs and exchamge O2 and Co2 !!
so answer is last one !!
