<h3><u>Answer;</u></h3>
Glial cells
<h3><u>Explanation</u>;</h3>
- The nervous system is made up of neurons and glia. Neurons are specialized cells that are capable of sending electrical as well as chemical signals
- Glial cells or neuroglia are non-neuronal cells in the central nervous system (brain and spinal cord) and the peripheral nervous system.
- <u>Glial cells are cells that provide support functions for the neurons by playing an information processing role that is complementary to neurons.</u>
When we talk about evolution we come across the process of natural selection. Genetic variation is always required for the natural selection. A change or variation in the genes may help the individuals in a population to better adapt to the environment. Such changes may be brought by mutations or random mating in the population. Such variations help in the survival of the population by allowing them to adapt to changing environmental conditions.
<span> C - nitrogen fixation, ammonification and nitrification </span>
