Two questions + some follow-up questions: 1) If I drop "bir", am I saying: "The man eats lemons"? And if so, what is the difference between saying "Adam limon yer" and "Adam limonler yer". Ah, I might know this one.. wasn't there something about food not being in plural? But say I want to say something like "Adam kitap okur" this would just be wrong, right? But "Adam kitaplar okur" would be fine?
2) What's the difference between erkek and adam? I thought adam was somewhat akin to human?