Many factors affect water quality
Sedimentation.
Runoff.
Erosion.
Dissolved oxygen.
pH.
Temperature.
Decayed organic materials.
Pesticides.
D) Amphibia was considered to be the first to develop lungs
The answer is D because the particles in a liquid have more kinetic energy than the particles in the corresponding solid.
Explanation:
because the pressure exerted by artery is more than that of vein due to its narrow lumen and thick walls...causing it difficult to clot.
