From example sentences and a dog as a noun, an apple, so placed both nouns page from sentence 1 does that mean she has one dog and two sentences mean, I asked one of the apples.
The sentence is a noun and apple dog a, an, therefore, placed in front of the noun phrase one meaning. She has a dog, and the second sentence means. I wish Apple ball.
From the example sentences dog apple is a noun, and a an lay in front of nouns both from sentence 1 has meant that she has one dog. And sentences 2 I have an apple.