In a researcher's lab in the EEB department at UM, they expose small crustaceans to infectious diseases. An undergrad working in this lab put 3 infected hosts in a beaker with 15 uninfected hosts. 6 of the uninfected hosts became infected. What is Ro for this disease?

A. 2
B. 0.5
C. 15
D. 6
E. 3

Zoo geographic regions are characterized by the presence of specific groups of animals these regions are determined by the taxonomic or phylogenetic relationships of animals. the map shows the zoogeographic regions proposed by the naturalist alfred russel wallace in 1876. the similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between the organisms in both locations ?