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.
These animals possess three living cell layers (i.e.: ectoderm, mesoderm, and endoderm) which makes them triploblastic. The platyhelminths, or flatworms are an economically important group because they include the parasitic tapeworms and flukes, which affect both humans and the livestock we depend on. These acoelomates are advanced over other radiate animals in several ways: 1. Their bilateral symmetry adapts them for direct movement. 2.