I meant to ask if plants can get cancer on their own. Just like humans and
animals. BRBR

Not that I know of. Plants do not respond to virus or other irritants the same
as animals.

I have notice some abnormally bright green spots in my tulip petals. They
are supposed to be yellow, not green.

I would have to see them to hazard a guess. it does not sound like a virus. In
tulips, a virus may cause streaks in the flowers, or no other symptom besides
general decline.
A virus infection in a plant is rarely localized that I know of. Sooner or
later it spreads to the entire plant.
Iris,
Central NY, Zone 5a, Sunset Zone 40
"If we see light at the end of the tunnel, It's the light of the oncoming
train."
Robert Lowell (1917-1977)