Which of the following true statements best supports the endosymbiotic theory? select one: a. all mitochondria have circular dna. b. all eukaryotic cells have ribosomes. c. all eukaryotic cells have dna. d. all mitochondria function as powerhouses to the cell.

c. All eukaryotic cells have DNA

Explanation: The endosymbotic theory deals on the mitochondria and chloroplasts to having their own DNA and this DNA maybe similar to bacterial DNA. This theory was later proven to be true for DNA, RNA, ribosomes, chlorophyll and protein synthesis.

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.