4 ms·

I was going to guess it's because they don't have a vascular system that pumps cells around throughout all corners of their body.

• dractori 7y ago
  https://www.britannica.com/science/vascular-system https://www.britannica.com/science/vascular-system
  • gowld 7y ago
    Plant vascular system transports water and nutrients, not the plant's DNA.
    • pvaldes 7y ago
      Vascular system can transport also genetic matherial sometimes (and is a big problem).