Refer to the diagram below showing a phylogenetic tree of immunodeficiency viruses. 
Based on the information in the figure, can we infer whether HIV-1 or HIV-2 moved into humans first? Explain.
Definitions:
COPD
Chronic Obstructive Pulmonary Disease, a lung condition characterized by persistent respiratory symptoms and airflow limitation.
Asthma
Condition in which bronchioles constrict and cause difficulty in breathing.
Allergies
Immune system reactions to certain foreign substances (allergens) that are typically harmless, causing symptoms like sneezing, itching, and swelling.
Smoking
The act of inhaling and exhaling the smoke of burning tobacco or other substances.
Q30: Most emerging diseases are caused by<br>A) viruses.<br>B)
Q83: Which application of phylogenetic trees cannot be
Q127: Biologists have described well over a million
Q136: Which would not be considered an example
Q142: RT-PCR<br>A) amplifies cDNA fragments.<br>B) generates synthetic oligonucleotides.<br>C)
Q183: Which example would not be considered a
Q193: Pharyngeal nerves in vertebrates are much longer
Q209: Biologists generally favor using _ over antisense
Q239: Which DNA sequence forms a palindromic sequence?<br>A)
Q244: Suppose researchers know that two species of