Match each environmental change with its description. chemicals react with water and oxygen that enter water systems. arrowbothnutrients in excessive amounts enter water systems, causing algal bloom. arrowbotha high concentration of toxic chemicals is present in the bodies of animals at the highest trophic levels. arrowboth

it should be d) transitional fossils.

they show the gradualism of evolution throughout a period of time

you know that this symptom is misleading and quite often is related to: heart attack

a heart attack is a condition that occurs when the blood flow that transports oxygen to the heart muscle is damaged or cut off completely. the coronary arteries that supply the heart muscle with blood flow can be blocked by the accumulation of plaque. also, when the plaque within the heart artery breaks, it creates blood clot that can also hinder the blood flow. men that are over 45years of age and women that are over 55years of age are at risk of having a heart attack. the symptoms of a heart attack include chest discomfort, chest pain, coughing, and shortness of breath.

what about it?

is this a ?