Answer:
Friedrich Mieschers was a Swiss physician who discovered the DNA from white blood cells.
<em>Hence, the contribution of Friedrich Mieschers for the genetic code is that he isolated and observed the DNA. DNA is the material from which the genetic code is made. </em>
Friedrich discovered that the white blood cells have a substance called nuclein which is present in the nucleus of an atom. He discovered that this substance was acidic in nature and contained phosphates hence, it could not be a protein.
The life-form during the Precambrian time was cyanobacteria.
Answer: perpendicular
Explanation: Joint can be found in areas of the body where two or more bones are connected together, practical examples in the human body can be traced to our elbow, wrist, hip, knee. At Each of these points mentioned, it could be observed that it serves as a meeting point for two or more bones which are linked and formed around an axis. This joints enables us to conveniently move, twist our rigid bones in different directions perpendicular to the plane (that is in a direction opposite or away from the direction of the plane).
In "Hydroelectricity" we build dam in order to produce electrical energy by rotating our huge turbines. As Dam separates the division of water into two parts, It can store/prevent flooding and protect community
In short, Your Answer would be "Hydroelectric Power"
Hope this helps!