Answer: Because some mutations can exert selection pressure on some mutations, selecting them positively in order to perpetuate the species.
Explanation:
Malaria may have exerted selection pressure on the human genome, causing it to evolve by selecting those genes that provide this resistance to the Malaria disease, prevailing against the negative effect of the mutation itself. Therefore, this phenomenon is seen in populations where mutation of the gene that codes for glucose 6-phosphate dehydrogenase is common, for example in some african pupulations.
Answer:
because it is just easy that way
Explanation:
Peptones and beef extract
MacConkey agar is a selective and differential culture medium for bacteria designed for isolation of Gram negative and usually enteric bacilli, based on their ability to ferment lactose. It contains bile salts, crystal violet, neutral red dye. There are many variations of MacConkey agar depending on the need. This medium was developed by Alfred Theodore MacConkey. This agar can distinguish gram negative bacterias that can ferment. This is known as the indicator medium.
