PLS ANSWER ASAP!!! Referring to the energy diagram below which arrow segment represents the activation energy of this reaction? 1. Arrow B
2. Arrow A
3. Arrow C
4. Arrow D

Organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.

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