Bacteria cells, I believe so.
Answer:
The main difference between red brown and green algae is that red algae contain chlorophyll a, chlorophyll d, and phycoerythrin, while brown algae contain chlorophyll a, chlorophyll c, and fucoxanthin and green algae contain chlorophyll a, chlorophyll b, and xanthophylls.
Cell - neuron, egg, bacteria, perenchyma
tissue - bone
organ - leaf, flower, eye
organ system - blood, human skeleton
organism - mushroom, bear
not 100% sure but tried