Answer:
Ionic compounds
Explanation:
Ionic crystals are hard and brittle and have high melting points.
Hmmm let me think.........
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:
Decreased biodiversity and increased red fox population
Explanation:
