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 are the worldâs most numerous group of animals with two to 20 million individuals, usually smaller than one millimetre, per square metre of soil. These nematodes include a minority that can cause diseases to humans, animals or plants. Unfortunately these pathogenic organisms share a strong resemblance to each other as well as to