<h2>Answer:</h2>
The correct arrangement of steps that occur in producing neuron cells.
The steps are from 1 to 4 according to arrangement.
- Genes that lead to the production of undifferentiated precursor neurons are activated.
- Stem cell arise from the inner mass of cells.
- Signalling factors trigger differentiation in stem cells.
- Signalling factors causes precursor neurons to produce neurons.
Energy in the form of ATP provides the carbon needed to make glucose.
A or D... depending on which country you are talking about and if it is a developed or developing country...
the effects of overcrowding will definitely be negative...
sorry not much help!
Valence is the number of electrons an atom must gain or lose in order to consummate its outer energy level or have a stable octet in its outer shell
