State appropriate terms for the following:
$(i)$ Amphibians of the plant kingdom.
$(ii)$ Plants not having well-differentiated body design.
$(iii)$ Single-celled,eukaryotic,and photosynthetic organism.

(N/A) $(i)$ Bryophytes: These are known as the amphibians of the plant kingdom because they require water for fertilization despite living on land.
$(ii)$ Thallophytes: These are plants whose body is not differentiated into roots,stems,and leaves,forming a thallus-like structure.
$(iii)$ Protists (specifically algae like Chlamydomonas): These are unicellular,eukaryotic organisms that possess chloroplasts and perform photosynthesis.