Answer:
is an acidic colorless gas with a density about 53% higher than that of dry air. Carbon dioxide molecules consist of a carbon atom covalently double bonded to two oxygen atoms.
Explanation:
Animal cells (which are Eukaryotes) contain a nuclues, while Bacterial cells (which are Prokaryotes) do not contain a nucleus.
A.
Explanation: Because he learned it in previous years when it was different, now it becomes hard to learn the new information.