Answer:
Both have strong scientific support.
Explanation:
Hope it helps :)
Ans.
Sickle-cell disorder shows defected red blood cells, due to mutation in gene that code for hemoglobin. The mutated genes for sickle-cell disease are found in higher percentage of sub-Saharan African population as it provides protection against malaria as compared to population of United States.
Malaria is common in sub-Saharan Africa region and there, natural selection favored gene for sickle cells, because it might be beneficial to people having sickle cell disease that makes them able to survive in such condition and transmit their genes to offspring.
On the other hand, in those Africans, who moved to United States, where malaria is uncommon or absent, natural selection favored normal, wild type genes, resulting in fewer people with defected sickle cell.
Thus, the evolutionary process behind this is 'natural selection.'
The correct option is (D).
An amino group and carboxylic acid group are the most basic common components in all amino acids. While, R group in the amino acids always different (here R describes the alkyl group).
Organic substances having both amino and carboxylic acid functional groups are known as Amino acids. Alpha-amino acids, which make up proteins, are by far the most significant of the hundreds of amino acids found in nature.
Amino acids perform a variety of processes in our body including muscular growth, delivering nutrition, prevent disease, and many more. A lack of certain amino acids can lead to a variety of health concerns, including lowered immunity, digestive disorders, depression, less mental alertness, slower child growth, etc.
There are total 20 amino acids, out of them 9 are essential amino acids means they are not synthesis by our body they must be taken outside from diet and nutrition.
To learn more about amino acids, refer this link.
brainly.com/question/11134520
#SPJ9
Answer:
It's either B or C
sorry i couldn't be of more help
Explanation:
