It is A the Answer mate. (:
Answer:
O The organism has a nucleus
O The organisms has a cell membrane
Explanation:
Eukaryotes are organisms whose cells contain a nucleus and other membrane-bound organelles. There is a wide range of eukaryotic organisms, including all animals, plants, fungi, and protists, as well as most algae. Eukaryotes may be either single-celled or multicellular.
The answer is 97 your welcome
B. his method is unsound because it changes the compounds involved.
If you had Fe (II) Oxide and switched the II to III the compound of Fe (III) Oxide is entirely different. i.e. FeO is Iron II and Fe2O3 is Fe III.