^3^
the diagram illustrates radioactive decay.
which statement correctly identifies structures 1 and 2 in the diagram?
structure 1 is an unstable atom that turns into structure 2, a new atom.
structure 1 is a stable element that breaks down into structure 2, an unstable element.
structure 1 is a radioactive element that loses particles to create structure 2, released energy.
structure 1 is a radioactive atom that decays into structure 2, half of the original unstable element.

Depending on the organism the number of in a cell may change

What is the difference between the conducting zone and the respiratory zone of the respiratory system? the conducting zone is a series of cavities and tubes that move air to the respiratory zone where gases exchange with the bloodstream. the conducting zone exchanges gases between the lungs and the alveoli and the respiratory zone is a series of cavities and tubes that move air to the conducting zone. the conducting zone moves oxygen into the cells and the respiratory zone takes carbon dioxide away from the cells. the conducting zone moves oxygen into the bloodstream and the respiratory zone takes carbon dioxide away from the bloodstream.

With the word calcite wich completes the analogy mineral, erosion, marble, or aragonite