Fish in flowing water tend to face: O Downstream
O No particular direction
Ο Ο Ο
O Perpendicular to the current
Upstream

Upstream

Explanation:

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

answer:

sequence 1- deletion

                  2- duplication

                  3- insertion

                  4- substitute

                  5- inversion