Aerobic Respiration
<span>Cellular respiration involves a series of chemical reactions. The enzymes increase the rate of the reactions. So option “B” is the correct option as far as the given question is concerned. The reactions that are catalysed by enzymes actually helps the organism to grow, respond to various changes in the environment, reproduce and continue maintaining their own structures. Cellular respiration is also considered a part of the metabolism process. This process actually helps in carrying the oxygen through the blood. </span>
Just So you know, <span>The molecular clock, explains Blair Hedges, is a tool used to calculate the timing of evolutionary events. Instead of measuring seconds, minutes and hours, the molecular clock measures the number of changes.</span>
<h2>Movements of Arms.</h2>
Explanation:
Abduction; Flexion.
When any part of the body is moved away from the median plain of the body axis,then the joint movement is called abduction. In the first case when we bring up hands laterally , hand moves away from body axis,. So, it is Abduction.
When any joint is moved in such a way that the angle between the two bones of the joint decreases i.e. the two ends of the bones come closer, then the movement is called Flexion. In the second case when we try to rub our eyes we fold the elbow, hence the angle of elbow joint decreases. So, it is an example of flexion.
