The "medium" is the substance or material that carries a mechanical wave. One of the most important things to remember about waves is that they transport energy, not matter. This makes them different from other phenomenon in physics.
For simple definitions, visit the following website:
https://www.ducksters.com/science/physics/waves.php
Answer:
B) a sequence of three nucleotides
Explanation:
A codon is the sequence of three nucleotides that decide that which particular amino acid would be incorporated in the polypeptide chain. Each codon code for a particular amino acid and responsible for the primary structure of proteins.
During translation the transfer RNA have the anticodon on its one side and amino acid bound to it on its other side. It adds the amino acids to growing polypeptide chain by binding to particular codon on messenger RNA.
Example; AUG is the starting codon for every protein and code for methionine in eukaryotes and anticodon for it is UAC.
<h2>Laser vision surgery</h2>
Explanation:
- Laser vision surgery procedure is a mainstream treatment for vision issues. It decreases or wipes out the requirement for eyeglasses or contact focal points.
- Laser methodology can help right refractive blunders. These are issues brought about by an incompletely formed eyeball or cornea. The cornea is the away from on the facade of the eye that twists and concentrates light. Refractive mistakes cause light from an article to be loosely centered around the retina of the eye. This causes an obscured picture. Refractive mistakes regularly happen in any case solid eyes.
- These are the 4 fundamental kinds of refractive mistakes:
- Nearsightedness(myopia). Close articles show up sharp, yet those out there are obscured. The eyeball is longer than ordinary from front to back or the cornea is bent to an extreme. Pictures center before the retina rather than on it.
- Farsightedness (hyperopia). Far off articles can be seen plainly, however questions very close are obscured. The eyeball is shorter than ordinary or the cornea is excessively level. Pictures center behind the retina.
- Astigmatism. Articles are obscured at any separation. The cornea, focal point, or both are formed with the goal that pictures aren't centered strongly around the retina.
- Presbyopia or maturing eye. The eye loses its capacity to change center as a result of the common maturing process. This regularly happens between ages 40 and 50. Refractive medical procedure can't right this issue. It can make separation vision more clear. In any case, it might aggravate close to vision.
