Examlex
Blended learning was first introduced in which of the following states?
Carbon
A chemical element with symbol C and atomic number 6, known as the basis of all known life and the fourth most abundant element in the universe by mass.
Hydrogen
The lightest and most abundant element in the universe, consisting of one proton and one electron, and widely used in chemical reactions and as a potential clean energy source.
Microglia
Specialized glial cells in the brain and spinal cord that act as macrophages, cleaning up debris and dead cells.
Immune System
The body's defense system against infections, diseases, and foreign substances, comprised of various organs, cells, and proteins.
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