Human migration and global trade are two factors that have altered geographic distribution of parasites. one result of this phenomenon is that humans are introduced to new infections more often, and they can be co-infected by several parasites from different species or lineages. these co-infections can result in matings between individual parasites of the different species and lineages. what biological diversity concept does this phenomenon provide evidence for? a) hybridization of species, specifically parasites
b) ecological niches
c) reproductive barriers
d) geological barriers

Why might a single rock layer exhibit different types of sedimentary rocks within it? view available hint(s) why might a single rock layer exhibit different types of sedimentary rocks within it? such a rock layer, termed a facies, when traced laterally represents a variety of depositional environments that formed in a sequence over time. such a rock layer, termed a facies, when traced laterally represents a single depositional environment that formed over time. such a rock layer, termed a facies, when traced vertically represents a variety of depositional environments that formed at the same time across a broad area. such a rock layer, termed a facies, when traced laterally represents a variety of depositional environments that formed at the same time across a broad area. such a rock layer, termed a facies, when traced vertically represents a variety of depositional environments that formed in a sequence over time.

What are two ways besides voting that citizens may participate in government?

What types of jobs typically are found in ghetto, inner-city neighborhoods? a. low-wage positions, typically in retail outlets, that require little education b. professional positions with banks, doctors' offices, and other similar businesses c. hourly factory and manufacturing positions d. positions that require advanced education, such as those in financial or technology firms select the best answer from the choices provided.