Which of the following us an example of an open system?
an aquarium with both pants and animals
an enzyme found in deep ocean organisms that allows them to grow
a living single celled organism like phytoplankton
a river that has been dammed

Which of these definitions have been paired with the correct type of cell?

Idon’t understand this can someone give me the answer? you

Hydrogen has only one electron in its only (and outer) electron shell. if a hydrogen atom were to absorb a small amount of energy, where would bohr say the electron would go? a. fly off the atom b. nowhere, it would just speed up. c. spiral inwards towards the nucleus d. move up to another shell that would form