The hypothesis by Coleman was that the product of the ob+ gene was the appetite suppressing hormone. Hence, the homozygous ob/ob mutant are in a position to synthesize that hormone, and its circulating level would be zero. He also hypothesized that the product of the db+ gene was the receptor for the appetite-suppressing hormone. Thus, the homozygous db/db mutant would be able to synthesize the hormone but would not be in a position to respond to it. It would eat excessively and produce large amounts of body fat, which in turn would produce large amounts of appetite-suppressing hormone . In the absence of a receptor, the db/db mutant's hormone level would remain abnormally high.
Coleman's hypothesis were confirmed when the precise functions of the ob+ and db+ genes were determined. The peptide hormone encoded by the ob+ gene was named Leptin.
The layers above would be not as old and the layers below would be the older layers.
Answer:
C.) nerves
Explanation:
A nerve is a thin bundle of fibers that connects the body to the brain and receives and transmits messages. I hope this helps! ^-^
Answer:
animals will use sound, colors, and stance. Another way would be by leaving their imprint or mark on their territory. For example a dog peeing on an area they used.
Explanation:
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Retina allows the eye to regulate how much lint can enter.