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.
While some mosquitoes lay their eggs on the surface of the water, the most abundant species deposit their eggs on moist soil. These eggs may lie dormant for several months and even years and will not hatch until they are covered by rain water or tides. Four to five days after the eggs hatch, the larvae are full grown.hile some mosquitoes lay their eggs on the surface of the water, the most abundant species deposit their eggs on moist soil. These eggs may lie dormant for several months and even years and will not hatch until they are covered by rain water or tides. Four to five days after the eggs hatch, the larvae are full grown.