Cow killer. Its a wingless wasp that looks like a huge red ant, may not always be red. But most of the time is.
They are over a half an inch (.68) in diameter, round and have two colored halves.
All flowers are different. Be more specific
A 3 inch gold needlecase.
marsh Marigold
Could be a beetle from the Dynastes genus like Dynastes tityus.
2 Centimeters is about 0.787042 inches (less than one inch).
It is Yellow and sometimes with a orange center.
a inch because when you see the tree the next day it looks the same as last time but a inch bigger
Most likely a wolf spider
Well...my nose is that big, and looks pretty normal. It really just depends on your face. I'm sure it looks fine :)
2.5 cm looks like about 1 inch on a ruler
Cut it back to about an inch from the soil, give a light feed and water it and it will flower again in the Autumn.