When this happens, the thyroid gland is no longer under pituitary control. The amount of hormone it produces is dependent on levels of TSI. TSI are the direct cause of hyperthyroidism in Gravesâ disease and various immune system chemicals known as cytokines also contribute to the symptoms that occur in this disorder.
Iguanas are reptiles and nearly all reptiles lay eggs. There are some reptiles that do not lay eggs, but they are very rare. Female iguanas usually lay a clutch of eggs every year once they're mature. If there is no male iguana, she will still lay eggs, but they won't be fertile.
Retired in 2005, breeding Araucana chickens. Most store bought eggs have a best before date on the carton but 30 days is usual. You do not need to throw out eggs older than that, just do a float test. Put the eggs in a bowl of water and throw away any that float to the surface, boil up the rest and use for lunches etc. 3 people found this useful.