No, there were no trees during the Precambrian period. In fact, there were no plants at all on land.

Here's why:

* The Precambrian period lasted from 4.5 billion years ago to 541 million years ago. Life during this time was primarily in the oceans, and consisted mainly of single-celled organisms.

* The first land plants didn't evolve until the Silurian period (around 443 million years ago). These early land plants were very simple and small, unlike the trees we see today.

* Trees, as we know them, evolved much later, during the Carboniferous period (around 359 to 299 million years ago). This was a time of significant plant evolution, and the landscape became dominated by large forests of trees.

So, while the Precambrian was a time of great change and the emergence of life on Earth, trees were still a long way off in the future.