Answer: Hemoglobin is an iron containing protein composed of four polypeptide chain and made from 574 amino acids. It play a key role in oxygen transport from lungs to all parts of the body.
Mutation in hemoglobin: If mutation occurs in hemoglobin then glutamine amino acid is replaced by valine amino acid which lead to abnormal hemoglobin structure which is sickle shaped and can not pass through blood vessels resuting into deficiency of oxygen in the body and the disease called is known as sickle cell anaemia.
Answer: The sodium-potassium pump.Explanation:
The concentration of sodium and potassium inside and outside the muscle cells are important in the regulation of contraction. These concentrations differ when a muscle is relaxing or contracting.
<span><span>Contraction: potassium concentrations are higher outside the cell than inside the cell.</span><span>Relaxation: the potassium concentrations are higher inside the cell than outside the cell.</span></span>
hope this helps :)
Answer: A scientific question is one which can be tested using a set of experiments and comparing with a control variable. Out of the given questions, the nonscientific questions are:
"Why do people in my neighborhood have more cats than dogs?"
"How can the position of the stars and planets be used to predict the future?"
Both of these questions can not be answered through the scientific method, so they are nonscientific.
Is that in evolution? Genetic modifications and advancement in DNA helps organisms survive better in their environment