Students planted three bean seeds after several days, they observed that the seeds' roots were growing downward into the soil which type of tropism were the roots displaying a. geotropism b. thigmotropism c. phototropism d. photoperiodism

The answer is A. And if you are from connections Academy 7th grade science it's
1. A
2. C
3. B
4. D
5. A

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass