This is because the GP120 protein
of the HIV virus that forms the ‘knob’ is
essential for the infection of CD4 cells
of the immune system by the virus. The glycoprotein is, therefore, a good
target for vaccines especially since the
molecule is highly conserved because most mutations in the region could be highly deleterious to the virus.
Answer:
D. Trees grow back after a forest fire.
A.
Sound absorption depends more on the thickness of a material than its color.
Answer:1) Water carries the nutrients to the cells of our body.
2) Water helps in the excretion of toxins and wastes.
3) Water regulates the body temperature.
Explanation:
Clouds appear white because of scattering. The droplets in the clouds are huge compared to the wave length of light, so all wavelengths scatter at the same time. Hope this helps! :)
