Drag each tile to the correct location
determine whether the material is a mineral or a non-mineral based on the description
mineral
non-mineral
description
mineral or non-mineral?
calcium is homogeneous. three
percent of earth's crust is made
of calcium.
glycerin is a viscous liquid
at room temperature.
emerald is hard and does not
decay. its chemical formula is
be3al2sios.
chlorophyll is produced in plants
during photosynthesis.

Astudy by solloch and et. al., in 2017, gives the map above which shows the frequency of alleles with a ccr5-delta32 mutations over 87 different countries. this mutation deletes the presence of a co-receptor (ccr5) on the outside of human t-cells (lymphocytes). some viruses, such as the one responsible for the black death and human immunodeficiency virus (hiv), require this receptor for attachment to host cells during the infection process. the black death was an epidemic that passed over northern europe during the 14th century killing nearly 60% of europeans. according to this information, which explanation best explains why northern europeans show a greater immunity for hiv than some other parts of the world?