Triops longicaudatus, a crustacean often referred to as a type of tadpole shrimp, is found in various freshwater bodies, especially temporary pools, in North America, South America, the Caribbean, Japan and some Pacific Islands.
At the very least, all viruses contain two components: the capsid (a protein shell), and a genome, consisting of either DNA or RNA. Some viruses also include accessory proteins to aid in infection, or a lipid bilayer to further protect their contents from the environment.atellite viruses are some of the smallest possible reproducing units in nature; they achieve this by relying on both the host cell and a host virus (in this case, TMV) for the machinery necessary for them to reproduce.
The structure of a simple virus consists of a protein shell and a viral genome. The size of an ordinary virus usually varies from 10 to 300 nm and it is composed of a viral genome and a capsid.Sometimes there is also an enveloppe. More complex viruses also occur, with two protein shells for example.he structure of a simple virus consists of a protein shell and a viral genome. The size of an ordinary virus usually varies from 10 to 300 nm and it is composed of a viral genome and a capsid.