Changes made during the copying process are represented by *in the diagram Before:GTC CAT CAC CGG TAG TCG

after:GTC CAT *GAC CGG TAG TCC*

the errors indicated by* could affect a cell by

It must be measured in k.hope my answer is to you : )

The population of unionid mussels decreased after zebra mussels were introduced. zebra mussels competed with the unionid mussels for food. the zebra mussels were able to displace the unionid mussels, allowing the zebra mussel population to increase  over the years. the unionid mussel population decreased because  of lack of food.

Search it on google it will give u the exact answer am pretty sure