Answer:
A radioactive (unstable) phosphorus isotope is made to replace a nonradioactive isotope of phosphorus in the molecule
Explanation:
Phosphorus has both unstable (radioactive) and stable isotopes. In any compound that contains phosphorus, the phosphorus atom present may be either a stable isotope of phosphorus or an unstable isotope of phosphorus.
However, if the molecule contains a stable nonradioactive isotope of phosphorus, it is possible to convert this isotope in the molecule to the unstable radioactive isotope by carefully carrying out exchange reactions in which the phosphorus isotope replaces the nonradioactive isotope in the molecule.
This is usually done in order to create radioactive tracers which are used to study chemical reactions and biochemical processes.
Answer: nurturist
Explanation:
The American psychologist and behaviorist Burroughs Frederick Skinner ( 1904 – 1990) was a Harvard Professor of Psychology. He is considered the pioneer of modern behaviorism. He explained in his book “Behavior of Organisms “ how environmental variables control behavior. He believed that parents’ nurturing shape the child’s language behavior.
The tRNA molecule determines the type of amino acid!
Answer:
Photogenic means looking attractive in photographs or on film. Photography means a picture made using a camera, in which an image is focused onto film or other light-sensitive material and then made visible and permanent by chemical treatment, or stored digitally.
Answer:
They grow more slowly, reproduce less, and populations decline.
Explanation:
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