Using punctuation marks correctly is important for understanding sentences.

What is this solid made of?

There are sediments at the bottom of this lake that have accumulated over centuries.

He is an expert in phytopathology, making a significant contribution to agriculture.

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.

This biennial plant matures and blooms over the course of two years.

Phytobenthos is an important part of the marine ecosystem.

His art style is unique, it's neither fish nor fowl.