Practice 1: What is so important about DNA? Select all correct answers.

A. DNA is found in all organisms and carries instructions to build those organisms

B. DNA found in one organism probably shares similar instructions found in another species

C. DNA is composed of only four bases that repeat in a sequence that is different for each species

D. Some organisms don’t actually have DNA

E. The DNA of each organism is made out of different types of chemical

not too sure but maybe in the hot springs.

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.