1. imagine a mother and a father who both have freckles and are heterozygous for the trait, or ff. they are the p generation, or parent generation. create a punnett square to show their offspring, the f1 generation

if the type of the food available changes, then the frequency of beak types will change, because birds with beaks more suited to the available food will be more successful over time.

thinking it would be physical characteristics

d. cellulose and starch