| |
Unique Home Furniture, Home Decorating and Home Decoration Store
Regulate The Growth And Development: The second revolutionary advance in developmental plant biology was one made by botanists themselves. It was the discovery of several new plant hormones, substances which regulate the growth and development of plants. For almost 30 years after its discovery as a plant hormone in 1926, auxin had been regarded as the substance that could account for nearly all the phenomena of plant growth and development in which hormone action was involved.
A deficiency of growth hormone during infancy results in the development of a dwarf; these individuals are not deformed and are normal in intelligence and sexual development. An excessive production of growth hormone during infancy or childhood will lead to the development of a giant. When growth hormone begins to be produced in excessive quantities after normal growth has stopped, only the hands, feet, and chin enlarge; this condition is known as acromegaly (q. v.).
The FCC does not license the broadcasting networks, but it does regulate the relationship between the networks and their station affiliates. Also, the FCC does not license cable television systems, but it does regulate certain aspects of their operation as a significant adjunct to TV broadcasting.
|
|
|
 |
Child-Education-Usa.com |
|
 |
 |
|
Menu |
|
|
| |
| |
|
|
| |
|
