If you are counting the eight planets, then Neptune is coldest.
However if you mean the entire solar system then I don't know. Hope this helps
The right answer is ultrasound.
Ultrasound is an imaging technique that uses ultrasound. It is used routinely in human and veterinary medicine, but can also be used in research and industry.
Contrast ultrasound is one that uses a contrast medium. The contrast medium composed of microbubbles is injected into the bloodstream intravenously at the time of the ultrasound examination of the patient. The microbubbles of the contrast medium are highly reflective to ultrasound during ultrasound examination; thus making it possible to image the blood vascularization of the organs for diagnostic purposes.
Answer: organic.
The other three being proteins, nucleic acids (dna) and carbohydrate. They are all made up of the same elements. But your answer is organic. Hope this helps.
It is important to know chemistry first because you need to know what might happen or is happening if you do an experiment in biology. An example would be that my class just did an experiment with yeast and we needed to know about CO2 and how it was working and everything else. Hope this helps.