The external coverings of diatoms are made up of , while slime molds have cell walls containing . diatoms are because they make food through photosynthesis, while slime molds are because they eat decaying plant matter.

The external coverings of diatoms are made up of frustule which contains chloroplasts. Chloroplast is a organelle that has chlorophyll  pigment that captures light energy from the sun and utilize it for photosynthesis. Slime molds comes under category of fungi. Their cell wall is made up of cellulose. They undergo spore formation, their spore sac get rupture as cellulosic layer is light and releases spores which settles on the decaying plant matter.

hey bro i looked it up on google the structure of the eye-spot in euglena viridie, e. ehrenbergii, and phacus pyriyorme is not as franzé haa described it. the so-called “crystal body” and “lens bodies” were not found in any of the individuals of the species examined by me. as earlier observers have stated, the eye-spot consists simply of a mass of pigment granules arranged in a single layer, and probably embedded in a protoplasmic framework, but the latter could not be seen, and its presence was only inferred from the fact that the pigment granules must be held together in some way, thd the eye-spot as a whole is capable of expansion, and that the pigment granules can be separated from each other.

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