This primary immunodeficiency is extremely rare in the population, with less than 200 cases reported. patients with this disease have impaired lymphocytes, macrophages and neutrophils that do not allow these cells to travel to the site of an infection, and consequently many patients succumb to infections before the age of 2. what disease am i?

The answer is Leukocyte adhesion deficiency type 1. This is a sickness that reasons the immune system to breakdown, subsequent in a type of immunodeficiency. Immuno-deficiencies are circumstances in which the immune system is not capable to defend the body efficiently from foreign attackers such as viruses, bacteria, and fungi. 

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?