Bacteria have genes and DNA, too. If they have random mutations that give them a stronger cell wall or enzymes, they are less likely to die from antibiotics. This means that when we take antibiotics, only the mutated bacteria survive. These bacteria have fitness, which means-

organisms that lack symmetry are called asymmetrical and belong to phylum porifera/sponges.

organisms with specialized stinging cells belong to phylum cnidaria. stinging cells are called cnidoblast cells.

cnidarians show two morphological forms : polyp (sessile) and medusa (mobile)

filter feeding is observed in porifera members.  

alternation of generation is observed in coelenterata or cnidaria. there is alternation of asexual polyp form and sexual medusoid form. it is also referred as metagenesis.

it's unlikely a majority of a large population would agree on issues

hope this : )

d. organisms have cells with different shapes and functions.