The density of a population is a
the number of individuals per unit area.
b
the number of individuals born every year.
c
the number of individuals living in cities.
d
the proportion of males and females.

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 ?