The right answer is B
A radiotracer is an entity composed of a carrier molecule and a detectable radioactive isotope using devices such as gamma cameras or positron emission tomography.
A radiotracer is either a radioactive isotope alone or the combination of a molecule and a radioactive isotope. In this case, it is said that the molecule is labeled by the radioactive isotope.
A radioactive isotope is an atom whose nucleus, unstable, emits radiation. It could be :
- alpha radiation consisting of two protons and two neutrons.
- a beta radiation consisting of a negative electron (beta) or a positive electron (beta +, positron).
- a gamma radiation consisting of a high energy photon.
The discs flex and squish allowing<span> the vertebrae to move slightly... therefore giving the backbone flexibility
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1) Grass—->Rabbit—->Snake—->Owl
Answer:
In both cases, replication occurs so quickly because multiple polymerases can synthesize two new strands at the same time by using each unwound strand from the original DNA double helix as a template.
I think this is called relative dating...............
