Most organisms can be divided into two categories - prokaryotes and eukaryotes. What is the main difference between these two categories? A.
Eukaryotes are found in all of the six major taxonomic kingdoms.

B.
Prokaryotes do not possess a nucleus or any other membrane-bound organelles.

C.
Prokaryotes do not possess any means of locomotion and are thus unable to move.

D.
Eukaryotes are living organisms whereas prokaryotes include some nonliving matter.

B

Explanation:

They don't have an enclosed nucleus.

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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