A good laptop with Microsoft Office pre-installed? I wanted to get a decent laptop that comes pre-installed with Microsoft Office and has at least a 120 GB Hard Drive. good laptop with Microsoft Office pre-installed? I wanted to get a decent laptop that comes pre-installed with Microsoft Office and has at least a 120 GB Hard Drive.
Other Platyhelminthes characteristics shared by these creatures is they are bilaterally symmetrical, this means the left and right sides of their bodies are mirror images of each other. They have distinctive head and tail ends and their body contains three cell layers.
Platyhelminthes: Flatworms and Body Plans. As promised, today is back onto moving through the history of life on Earth. These next few posts are about a phylum known as Platyhelminthes (from the Greek platys meaning flat, and helmins meaning worm), and specifically about a class called Turbellaria.