3. Complete the statement: The term used to describe a one-celled organism is * O multicellular O prokaryotic unicellular primitive 4. Complete the statement: A characeristic that decribes a plant that

Unicellular organism

Explanation:

Unicellular organisms are organism that posses only a single cell. They are also referred to as acellular organisms. Some unicellular organisms are prokaryotes while a few of them too eukaryotes.

The major characteristic that describes a plant is the presence of green pigment called chlorophyll within the chloroplast which enables them to synthesize their food by themselves through photosynthesis

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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.