In the outbreak of malaria, the frequency of the recessive allele for the HbS gene will increase. The correct option is A.
<h3>What is the HbS gene?</h3>
HbS is a beta-globin gene known as sickle hemoglobin.
It causes sickle cell disease in humans.
The disease is expressed by two HbS variants or one HbS variant or one another beta-globin gene.
Malaria is caused by the plasmodium parasite, which is present in the saliva of the mosquito.
Thus, the correct option is A, the frequency will increase.
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A. Kidney
It is one of the major organs
There are more than 5 factors, but here are perhaps the most important ones:
1) Light: Light energy is a crucial component in photosynthesis, as it is the primary energy source of the process.
2) Carbon Dioxide: Another key ingredient in photosynthesis.
3) Temperature: There is an optimum temperature for photosynthesis that varies from organism to organism. Too cold or two hot, and rate of photosynthesis will be lower.
4) Water - Like almost all life process, water is a key component in photosynthesis.
5) Oxygen. A common misconception is that plants only "breathe in" carbon dioxide and expel oxygen. Plant cells actually require oxygen as well in order to function, and thus oxygen is a necessary part of photosynthesis.
tonsils are large lymphatic nodules h are located in the walls of the pharynx
The nuclide represented as X is thorium and this is an alpha decay where an alpha particle is removed off.
<h3>What is nuclide?</h3>
A kind of atom or nucleus which is represented by a specific number of protons and neutrons.
The equation given represents an alpha decay. In an alpha decay, an alpha particle is removed off.
The atomic number of the parent nuclide is more than the daughter nuclide by two units and the mass number of the parent is more than that of the daughter nuclide by four units.
Thus, the x is thorium.
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