I can be a member of a group but never blend in; what am I?

I have 4 legs in the morning, 2 in the middle of the day and 3 in the evening; what ...

I can be done with the teeth, the eyes or the mind; what am I?

Inside of me you will find a lot of spheres, some can be negative, some can be ...

I am venomous but dont bite, I lay eggs and have a bill but Im not a bird, if you ...

I am an instrument with which you can create something special like an emotional ...

Without me, you would be dead in three days or less. Without me, you could also ...

I am the reason you're here. I am often perplexing and can make you grind your ...

I am a server of justice, and you might have been served. I do resemble a boomerangs ...