Trilobites were abundant in pennsylvania. Trilobites were among the first of the arthropods, a phylum of hard-shelled creatures with multiple body segments and jointed legs. Their fossils first appeared in early cambrian period about 570 million years ago. The trilobite fossils show that during most of this time pennsylvania was providing favorable conditions for the trilobites.

Which hypothesis most likely inspired leeuwenhoek’s experimentation with new technology? if the amount of magnification is correct, then an individual germ can be seen, because individual germs exist but are too small for human eyes. if the amount of magnification is correct, then wounds can be kept clean of germs, because wounds are often infected during surgery. if the correct medicine is used, then a certain disease can be cured, because different diseases are caused by different germs. if the correct medicine is used, then germs can be grown until they are large enough to see, because most germs are too small to see in nature.