Charles darwin’s study of the galapagos finches led to an understanding of evolution. how is evolution studied? check all of the boxes that apply.

All three options

Explanation

1) Fossil records:

Fossils can be simply be considered as marks of the organisms that lived many years ago but donot exist now, but their marks exist like feces or footprints. They provide us evidence of organism's survival as well as evolutionary history and relatedness with other organisms. For example: Fossil from a specific layer of earth can tell the geologic timescales. They tell a story that if one organism was found in a certain age then which related organisms emerged soon after that age. It is a useful way of studying evolution.

2) DNA evidence:

All the DNA of every organism is composed of unique sequence of nucleotides which have a lot of importance in the evolutionary studies. DNA sequences of organisms mutate over the course of time which changes the organism's genetic study and evolves them into new specie. Therefore, this sequence of DNA can help in finding the ancestors of an organism and also that which organism is most related to a specific organism. This approach of studying evolution is called Phylogenetics.

3) Case studies:

Different evolutionary case studies performed by scientists can also provide evidences of evolution. For example: The Darwin's case study on finches of Galapagos  Island helped in assessing that how evolution occurred when finches were isolated by geographical barriers.

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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.

cell/ tissue/ organ/ organ system/ body