Answer:
Scientists are perhaps some of the smart few that make up the human population and are never short on knowledge. They research and discover and conduct tests to gain more knowledge, but the answer to your question is stars are huge celestial bodies made mostly of hydrogen and helium that produce light and heat from the churning nuclear forges inside their cores, and scientist know this because of their research.
Explanation:
<h2>Answer:</h2>
The correct answer is option B which is a 7-year-old female being treated with chronic transfusion therapy.
<h3>Explanation:</h3>
- Chronic transfusion therapy is the therapy in which a patient is given the blood monthly or weakly.
- It is usually done for patients of sickle cell disease in which due to genetic causes the patient's blood cells are in sickle shape and are unable to normal function.
- The cure of this disease is bone marrow transplant.
Helical separated the strands, polymerase attached the corresponding nucleotides after separation and ligand basically glues them together