WHy would it be
important to avoid restriction enzymes that cut the host DNA at a replication site?

Which of the following matches the organisms described with the correct domain? a. bacteria--unicellular, eukaryotic organisms with cell walls that do not contain peptidoglycanb. archaea--multicellular, eukaryotic organisms that do not have cell wallsc. eukarya--single-celled and multicellular organisms, with a defined nucleus and a variety of nutritional sourcesd. bacteria--unicellular, eukaryotic organisms that always lack cell walls

I’m doing some practice exam questions for biology, and i’m not sure how to do these 3 parts to the question.

Are the earth's ocean floor and continents the same age geologically? why or why not?