All marine invertebrates belong to the Domain __ Bacteria Eukarya Archaebacteria Animalia

## Step 1<br />The question is asking to which domain all marine invertebrates belong. In biological taxonomy, there are three domains: Bacteria, Archaea, and Eukarya. <br /><br />## Step 2<br />Marine invertebrates are multicellular organisms that do not have a backbone. They belong to the domain Eukarya, which includes all organisms with eukaryotic cells. <br /><br />## Step 3<br />Eukaryotic cells are characterized by having a nucleus enclosed within membranes, unlike prokaryotic cells. The other options, Bacteria and Archaebacteria, are domains that consist of prokaryotic organisms, which are single-celled organisms without a nucleus. <br /><br />## Step 4<br />Animalia is a kingdom within the domain Eukarya, and it includes all animals, including marine invertebrates. However, the question specifically asks for the domain, not the kingdom, so the correct answer is Eukarya.