The color of a star is primarily determined by its surface temperature.
For example, the really hot stars, called White Dwarf stars, have a white surface temperature, while a cooler star would have a more red color.
The ultimate source of energy for living things is the Sun. Plants and other photosynthetic organisms take the energy from sunlight to make glucose. This energy passes to other organisms through the food chain.
Answer:
1.Ions
2. Neurotransmitter
Explanation:
The neurons transmit the signals in the form of the electrical form and the chemical form.
The electrical signals are generated in the neurons as a result of the flow of ions or electrically charged species to maintain the equilibrium.
The signal from one neuron to another neuron takes place in the form of the chemical signal that is the chemical stored in the terminal of the axon called neurotransmitters.
Thus, ions and neurotransmitters are correct.
