generate energy by photosynthesis
I believe the answer you are looking for has to do with cells, they are the basic building block of life and are the smallest life that can support itself.
Five major Arthropod classes
Arachnida. mites, ticks, spiders, scorpions.
Chilopoda. Centipedes.
Crustacea. (crabs, lobsters, shrimp.
Diplopoda. Millipedes.
Hexapoda. Insects.
so your answer will be mollusks
The answer to your question (I BELIEVE) is true.
Cytokinesis is the point at which a cell with duplicated genetic material becomes two daughter cells with identical DNA.