Phylogenetic trees a. are a threatened species in costa rica's monteverde national park b. trace the flow of evolutionary change and diversification for a particular group of organisms c. have branches each of which represents an extinction event d. predict future evolutionary trends e. are usually at odds with fossil evidence

B is the correct answer. They can sometimes show an extinction but not always.

the "dirty dozen" chemicals banned in an international treaty are formally known as persistent organic pollutants, or pops. the united nations environment program provided this background on what they are and what they can do to humans and wildlife.

i hope this