The himalayan mountains were formed in a collision at a

Desert? The Himalayas are located in the desert? I don't think so.

The Himalayan mountains were formed in a collision at a fault line, more specifically, the collision between the Indian plate and the Eurasian plate.

Biochemistry, it deals with the chemical constitution, the breakdown and the synthesis of plant and animal products.

Alright, i'm gonna try to explain this as good as possible. the law of conservation is like a collection overtime. it never changes though. no matter how you change the constituent parts.