The right options are;
A. radial symmetry
B. acoelomates
E. asexual reproduction
F. sexual reproduction
Cnidarian are organisms that belong to the phylum; Cnidaria. Almost all cnidarians are marine animals, and there are several species which include the corals, jellyfish, sea anemones, sea pens, sea fans, hydras, and sea whips. The body form of the cnidarian is radially symmetrical with their mouths covered by tentacles. Many species of cnidarians possess complex cycles of asexual polyp stages, while some reproduce sexually. Cnidarian have many modes of feeding which include; parasitism, taking nutrients from symbiotic algae within their cells, and predation.
Here are the following solutions:
1 - A. Domains Archaea and Bacteria
2 - B. Both are prokaryotic
They have to describe the characteristics of life hope this helps.
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Cells undergoing mitosis just divide once because they are forming two new genetically identical cells where as in meiosis cells require two sets of divisions because they need to make the cell a haploid cell which only has half of the total number of chromosomes.