This should be Helicobacter pylori.
hope this helps!
Human evolution and natural selection both greatly relate to the susceptibility of a disease. For every disease that passes through, there will likely be a small handful of people who happen to be immune.
For example, the Black Death was a plague that peaked in Europe around year 1350. This disease unfortunately killed hundreds of people, but there were the select few who were immune. Later, these people had children and passed the trait down. The trait has likely continued to be passed down to the point where a majority of the population is likely immune to this particular disease.
This is an example of both human evolution and natural selection. Humans have evolved and passed this "immunity" trait down to children and grandchildren, and now it is unlikely that many people will be affected if this disease happens to pass through again.
This is also an example of natural selection because the people who were susceptible to the disease likely caught it and passed away. These were the people who were not considered "fit" for the environment and the disease.
Human evolution and natural selection work with each other to evolve humanity and our susceptibility to disease. Unfortunately, it is beyond likely that new diseases will constantly arise and may harm humans. However, as we continue to evolve, we are much less likely to catch previous diseases.
Amount/total x 100
First of all, you find the total amount of grams in the dessert
In this case you want to find the % of calories coming from fat.
So you would divide the number of grams of fat by the total amount of grams in the dessert
And then you would multiply the answer by 100.
Answer:
The elements in increasing order of atomic radius: oxygen, carbon, aluminum, potassium
Explanation:
The distance from the center of the nucleus to the outermost shell of the electron is known as the atomic radius of an element. The atomic radius decreases rightward along each period (row) of the table due to the increase in effective nuclear charge (the charge of the nucleus equal to the number of protons). Across a period, electrons are added to the same energy level and the increasing number of protons causes the nucleus to exert more pull on these electrons, which makes the atomic radius smaller. Atomic radius increases down each group (column) of the periodic table because of the addition of electrons to higher energy levels, which are further away from the nucleus and the pull of nucleus weakens. Another reason for the increase in atomic radius is the electron shielding effect, which is the reduction of the attractive force between a nucleus and its outer electrons due to the blocking effect of inner electrons
While moving from left to right in the second period, c
arbon comes before oxygen and so oxygen will have a smaller atomic radius than carbon. While moving down the periodic table, al
uminum comes before potassium even if they are not in the same period. So aluminum
's atomic radius will be smaller than that of potassium but bigger than that of carbon and oxygen.
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Proteins have up to four levels of organic structure.
1.Primary structure - the linear arrangement of amino acids.
2. Secondary structure - areas of folding or coiling within a protein.
3. Tertiary structure - the final three dimensional structure of a protein.
4. Quaternary structure - non covalent associations that bind multiple polypeptides into a single larger protein. E.g. hemoglobin has four polymers, two alpha and two beta chains. They are non covalently bound to each other to form a single large protein - hemoglobin.
