Answer:
Radioisotopes are radioactive isotopes of an element
Explanation: Radioactive isotopes are detected by: photographic film.
a cloud or bubble chamber.
a liquid scintillation detector.
a Geiger-Muller counter.
Yes,oxygen-rich blood is carried through pulmonary arteries from the lungs to the heart.
Answer:
More recent phylogenetic analyses, based on mitochondrial DNA, have suggested that the crocodile shark is closely related to either the megamouth shark or the sand sharks (Odontaspididae).
While humans are born, humans also die. it really is a matter of time.
I don't think it's A. Think of all the different colors, ages, and unique predetermined ( by environment and genes) physical abilities of mice. Not to mention the fur, which would hinder any observations made off of the animals' skin (physical appearance). There would be plenty of data, but it would be inaccurate data. Just like measuring a horse in hands (when all hands are different sizes), or like determining the distance between trees in steps ( when everyone has varying lengths of stride). C is the correct answer, as it is the only data which can be replicated. ( If one scientist measures in millimeters, then another scientist will be able to get the same results.)
