Malaria parasites infect a person by entering the bloodstream through mosquito bites. Then it enters in the liver where it multiplies in the liver cells before going back to the bloodstream where it infects and destroys red blood cells.
Now since people who have G6PD does not have normally-functioning red blood cells because they lack the enzyme glucose 6-phosphate dehydrogenase, it was observed that they have some sort of protection against the malaria parasites.
According to the studies done, boys have more protection than girls, because the girls only have one affected X chromosome making them partially G6PD deficient. While 2/3 of the boys who were tested get malaria, it does not progress into severe, life-threatening malaria.
However, the exact reason for this still requires further studies and research.
Phloem sap contains water and sugars
<h2><u>Answer:</u></h2>
The correct option is B (The longer-spined sea urchins existed before the shorter-spined sea urchins.)
<h3><u>Explanation:</u></h3>
The more drawn out spined ocean urchins existed before the shorter-spined ocean urchins.
Since the shorter spined urchins are higher up, that demonstrates that they developed from the more drawn out spined urchins, implying that having the shorter spines was useful to them as an animal types, so the shorter spines came AFTER the more extended spines.
<span>If the black horse is homozygous, what is its genotype?
BB
If the black horse is heterozygous, what is its genotype?
Bb
Hope this helps!
-Payshence xoxo</span>
Restriction enzymes (restriction endonucleases)