Answer:
They are unicellular
Explanation:
All plants beside seaweed (algae) are multicellular; they are made up of more than one cell.
Seaweeds are unicellular; they are made up of only one cell.
Well there are both benefits and negatives.
The benefits of it is that people will stop selling so much meat which also means that they stop killing so many innocent animals.
People won't be so overweight (aka fat)
there are some benefits.