Answer:
I tried
Explanation:
1) As human age, their respiratory system also ages making gaseous exchange less and less effective. With age the bone and muscular strength of tissues that keep the respiratory tract open lessen and it becomes the tract slowly collapses. The alveoli also age and become baggy losing their shape. The dead space between alveoli also increases.
This is accelerated by some environmental conditions such as air pollution and smoking. When particulate matter settles in the lungs and alveoli, it causes accelerate damage to the lung tissues and scarring. This is why people in chronically polluted areas, generally speaking, live less longer than people in cleaner environments especially due to respiratory problems they develop.
2) The oral cavity- Includes the lips, teeth, and tongue. The structures serve as articulators. The pharynx and the oral cavity- Both act as resonators that selectively amplify to varying degrees of intensity, fundamental tones and overtones. The larynx- An organ consisting of a cartilaginous framework containing muscles and joints. The vibratile part of the larynx are the vocal folds which are the producers of sound. The Lungs- They supply a stream of air which passes through the trachea.
3) Gas exchange occurs between the alveoli sacs and small capillaries of the circulatory system. Via this exchange, oxygen is delivered from the lungs to the bloodstream. The oxygen attaches to the hemoglobin of red blood cells. The red blood cells then transport the oxygen to cells, such as those located in your muscles.
It is a mutation that only affects the single nuteoclide of nucleic acid
Because each randomly selected piece of DNA goes into their offspring.
<span>Gene
expression is taking place when chromatin is less condensed. Highly compacted
chromatin is not accessible to the enzymes involved in DNA transcription,
replication and repair because transcription is being inhibited or inactive. Therefore,
looser configuration permits transcription or gene expression to take place. </span>
The three evidences that Murchison cites to prove that Jonas’s tumor did not arise from the cells of his own body are DNA sequencing, the DNA of cancer cells from all numerous Tasmanian devils were the same, the cancer spread through bite of the devil.
Explanation:
Elizabeth Murchison, an Oncology geneticist, conducted various researches to study about the spread of contagious cancer among Tasmanian devils.
Murchison conducted research on various devils like Jonas, Kimbo and studied how the cancer spread and invaded the devils.
The first thing that Murchison discovered was that the DNA sequence of the tumor cells was different from that of his own cells in his body. Further genetic profiling proved that the tumor cell sequence was similar to some other Tasmanian female devil, while the Jonas devil was a male.
The next thing she found was that all the cancer cells sampled from numerous Tasmanian devils were sharing the same DNA, which meant that it was spreading among the population of devils.
Since the Tasmanian devils are ferocious and bites each other, cancer must have spread through the saliva of each animal
Thus, Tasmanian devil cancer is a unique type of cancer that does not rise from one’s own cell but by spreading among its own population.
