Chrysophyta perform photosynthesis underwater, supplying oxygen.

He is an expert in paleobotany.

He is an expert in paleobotany, conducting research on plants from the dinosaur era.

Phytobenthos is an important part of the marine ecosystem.

Our project is scheduled to be completed on the twenty-second day of the month.

I think an amendment to the law is necessary.

There is a need to amend the law.

There is a clear duality in his character.

It has become the year 2022 in the western calendar.

My younger sister is participating in the church choir.