Answer:
they are expensive is the answer
Chameleons, those shade-shifting, intricately camouflaged lizards that can change color in response to environmental or behavioral influences. Since the oldest lineages of chameleons are all from Madagascar, scientists believe they evolved on the island and spread out from there. As far as paleontologists can tell, the first chameleons evolved shortly after the extinction of dinosaurs 65 million years ago. Unlike other animals that change color, such as the squid and octopus, chameleons do not modify their hues by accumulating or dispersing pigments within their skin cells, the researchers found. Instead, the lizards rely on structural changes that affect how light reflects off their skin, the researchers said. Although chameleons are believed to have originated in Africa or Madagascar, the oldest known fossil, 26 million years old, is Chamaeleo caroliquarti from western Bohemia.
Answer:genes are made up of DNA some genes act as instructions to make molecules called protein
Answer: Insulin Growth factor 1 (IGF-1)or Somatomedin C.
This is a <u>peptide hormone produced in the liver with a profound effects on growth at childhood stage. </u> Its secretion begins <u>slowly at infancy</u>, reaches<u> peak at puberty,</u> where it <u>influences growth sprout and remains at the plateau at old old age</u>. This secretion is stimulated by the <u>Growth hormone</u>.GH
However, its secretion is inhibited, by malnutrition, absence of Growth hormones receptors, non-response to Growth hormones stimulation; and blood concentration levels varies with insulin levels, types of nutrition, exercise and age.
Elevated Levels
Growth hormones is release into the blood stream from the pituitary gland.This is followed by its stimulation of synthesis of IGF-1 by the liver. <u>This hormone in-turn promotes the growth of the body systems which occurred by promoting the growth of cells of the body of certain organs especially; of the skeletal muscles, bones kidney, liver etc. </u>
The elevation of blood levels of GH, leads to corresponding over-stimulation of the liver to produce IGF-1. This leads to increase in system growth of body cells through rapid growth of general body cells.and thereforeT growth sprout.
