What type of muscles alternate between contracting and relaxing? a) Involuntary muscles b) Antagonistic muscles c) Agonist muscles d) Isotonic muscles

poor water quality affects most estuarine organisms, including commercially important fish and shellfish. the pollutants that have the greatest impact on the health of estuaries include toxic substances like chemicals and heavy metals, nutrient pollution (or eutrophication), and pathogens such as bacteria or viruses.

d is the answer

sorry if its wrong!

the eggs of the insects should be the first thing collected at the scene.

false

my teacher would say no s