DNA structure. DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C).
B.
Not A because the cells produce by meiosis as all different
Not C because the exchange of DNA is chance. There’s nothing there to pick only the most desirable traits.
Not D because i think B is a more likely answer
Brainliest?
Have a great day :)
The answer is the first option: <span>the development of genetic mutations within a population of organisms</span>
Answer:
The excess production of glucagonoma release glucagon in the blood causing increase level of glucose in the blood which in turn causes type 1 diabetes mellitus.
Explanation:
The islet of Langerhans cells in pancreas contain alpha cell that are mainly responsible for increase glucose level in the blood by secreting glucagon hormone which prevents the fall of glucose level in the blood.The glucagon is stored in the liver and is released by the process of glycogenolysis.
Type 1 diabetes mellitus is a disease when the body fails to produce insulin hormone that is released by the beta cells of islet of Langerhans in pancreas,which acts to reduce the level of glucose in the blood and thus maintain an equilibrium of glucose in the body.
