In the United States, US Postal Stamps are rated in 0.01 cent and up; the postage for a first class letter is 0.44 cents (of normal size and weight).
Trematodes are flattened oval or worm-like animals, usually no more than a few centimetres in length, although species as small as 1 millimetre (0.039 in) (Monogenea) and as large as 7 centimetres (2.8 in) (Fasciolopsis) are known. species that exemplifies the remarkable life history of the trematodes is the bird fluke, Leucochloridium paradoxum. The definitive hosts, in which the parasite reproduces, are various woodland birds, while the hosts in which the parasite multiplies (intermediate host) are various species of snail.
Nematodes, known as a roundworm, is phylum in the Kingdom Animalia of the biological classification system known as the Linnaean Taxonomic Hierarchy. Roundworms are one of the most common phyla of animals, this phyla include more than 20,000 species (over 15,000 are parasitic).ematodes, known as a roundworm, is phylum in the Kingdom Animalia of the biological classification system known as the Linnaean Taxonomic Hierarchy. Roundworms are one of the most common phyla of animals, this phyla include more than 20,000 species (over 15,000 are parasitic).