The modification of the building was necessary to meet safety regulations.

The chromosome is the structure that carries genetic information in cells.

I have a mole on my cheek.

I need to study for the quiz tomorrow.

Physiological changes occur in the body during exercise.

He tried to grasp the concept, but it was too difficult.

It is important to differentiate between fact and opinion.

I spent all day in the lab conducting experiments.

We need to stabilize the situation before it gets worse.

The cargo ship can carry up to 10 tons of goods.