a heart
In cabbage, the edible part is vegetative bud.
No, cabbage is not classified as a root vegetable. The edible part grows above the ground. Although cabbage has roots, they are not the edible part. Such things as carrot and potato (where the edible parts grow under the ground) are classified as "root" vegetables.
That is the purpose for which they are grown
Yes there is an edible plant in Antarctica. The sub-Antarctic edible plant is known as Kerguelen Cabbage.
yes. the purple plums are edible and any other plums
Broccoli is an edible green plant of the cabbage family. It is the large flowering head that is usually eaten. But the broccoli's thick stalk can be sliced and pickled, added to soup, stews, or made into a puree.
Other than picking it early or freezing it no.
Spinach is an edible flowering plant.
Passion Fruit
no and yes it really depends what you are trying to make out of it
No, you are eating an edible plant of the cabbage family.