1-Based on what you have learned in class and from yesterday's lab, how are natural selection and fitness related to each other. Explain in 2-4 sentences.  2-Based on what you saw in yesterday's lab, why are variations important in a population?​

Of seawater increases with decrease in the temperature. therefore, the cold water sinks to the deeper layers at the bottom

Duchenne muscular dystrophy is a serious condition caused by a recessive allele of a gene on the human x chromosome. the patients have muscles that weaken over time because they have absent or decreased dystrophin, a muscle protein. they rarely live past their twenties. how likely is it for a woman to have this condition? a) women can never have this condition.b) one-fourth of the daughters of an affected man would have this condition.c) one-half of the daughters of an affected father and a carrier mother could have this condition.d) only if a woman is xxx could she have this condition.

The normal shape of an enzyme is as shown in structure a. if the enzyme’s shape changes to that shown in structure b, what are two consequences of this change?