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.
Prions and viroids are the smallest infectious agents. Prions are infectious protein particles, and viroids are infectious strands of RNA. Viroids differ from viruses iâ¦n that they are ONLY a strand of RNA. Viruses have a protein coat protecting the nucleic acid molecule and some even have a lipid layer over that.