No. "The horse ate the apple." is a complete sentence.
Ate the cake is a fragment because there is no subject. To be a complete sentence, it must have a subject and a verb. You would need to change it to, I ate the cake, or She ate the cake, or so on.
In the sentence, "You ate an apple." the noun is apple, a word for a thing.
more fragment
She ate 3/4.
the boy ate the apple predicate(ate the apple)
Cave men probably ate the very early form of horse. And early Indians ate the modern day horse that we have today.
It is the verb to eat. For example i am going to eat an apple. Yesterday I ate an apple.
depends on the type of apple.
yes
he ate it
In the sentence "I ate an apple" the subject is I, the action or predicate is ate, and apple is the object, modified by the adjective an. you suck
me