1. Give one word for each of the following descriptions (a) The group of hydrocarbons to which 2-methyl-propene belongs
b) The name of the functional group that gives alcohols
their properties

Tolerance to high levels of salinity

The  grandmother cell  is a hypothetical  neuronthat represents a complex but specific concept or object.[1]  it activates when a person "sees, hears, or otherwise sensibly discriminates"[2]  a specific entity, such as his or her grandmother. the term was in use at least as early as 1966 amongst staff and students in the department of experimental psychology, university of cambridge, england. a similar concept, that of the  gnostic neuron, was proposed two years later