Someone could briefly characterize the approaches based on parsimony, distances, maximum likelihood and Bayesian methods for molecular phylogenetics, indicating their advantages and disadvantages.

What did hunter gathers do to alter the environment?

Which of the following is an eon in the time scale? phanerozoic proterozoic archean all of the above

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?