No
SUNFLOWER
Yes. Humans pollute the earth which hurts plants, they cut down trees which kills them, spray poisons on plants to kill plants they don't want, and genetically modify fruit and vegetable plants with poison inside them to kill bugs.
All Vascular plants grow from stems.
Sunflower and rose plants have woody and strong stems)
No
Salt will have an adverse affect on most plants.
they give oxygen to humans.
By humans
it mutates the flowers and this event will lead to a mutiny in your garden. please do not feed sunflowers bleach
[Inappropriate answer removed]
SUNFLOWER
All plants are eukaryotic.
It can affect us humans because then they can get more PROPER medications that will actually work while on the other hand if plants were not healthy they would probably harm humans rather than "fix" them.
They supply energy for humans, since we eat sunflower seeds.
The roots of sunflowers excrete toxin (not harmful to humans and pets) that prevents seeds from sprouting and seedlings from growing. The toxin is biodegradable but in the growing season it just might affect another sunflower shoot when planted too close together.
Sunflowers are plants and do not have prey. The only plants that do are insectivorous plants such as the Venus Flytrap.