As well as old leases, you should keep anything that documents the landlord-tenant relationship or supports the items you report on your tax return. If the IRS audits your tax return and you cannot produce the correct verification documents, you may be liable for additional tax and penalties.
The facet joints link the vertebrae together and give them the flexibility to move against each other. The facets are the bony knobs that meet between each vertebra. There are two facet joints between each pair of vertebrae, one on each side.
A fish's tail fin moves fro â¦ m side to side because it moves its entire spine from side to side when swimming. A whale's tail fin moves up and down because the animal's spine is moving up and down. Whales and dolphins (called Cetaceans in scientific jargon) evolved from land-dwelling mammals.