The International System of Units is the standard measurement system used by scientists all over the world.

The International System of Units is a standard of measurement widely used around the world.

He is spending a lot of time on experimental research.

This compound has a tetrahedral molecular geometry.

I am majoring in microbiology at university.

He is very interested in paleontology.

I am majoring in Biochemistry at university.

I am majoring in biophysics at university.

We have a responsibility to protect the biodiversity of the Earth.

The study of benthos is an important field in marine biology.