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.
Viruses differ, however, from the simpler autonomous replication of chemical crystals. This is due to the fact that a virus can inherit a genetic mutation and is also subject to similar natural selection processes of cellular organisms.nlike prions and viroids, viruses consist of two or three parts: a helical molecule, protein coat and sometimes a viral wrapper. All viruses have genes constructed from either deoxyribonucleic acid (DNA) or ribonucleic acid (RNA)âlong helical molecules that carry genetic information.