He is doing a special exercise to strengthen his sternohyoid muscle.

He is a character who decides his own fate.

The exam period is very busy.

He was behaving as if he was crazy.

When will this pain end?

He was recalling fondly the summer vacations of his childhood.

Chrysophyta are living in this pond.

Chrysophyta perform photosynthesis underwater, supplying oxygen.

Cell biology is the study of the structure and function of cells, which are the basic units of life.

We went to the zoo with our family on the weekend.