Nature

Question 1

Chain Reaction

Answer 1

A sequence of reactions where a reactive product causes additional reactions to take place. In a chain reaction, positive feedback leads to a self-amplifying chain of events.

Question 2

Emergence

Answer 2

Larger entities, patterns, and regularities arise through interactions among smaller or simpler entities that themselves do not exhibit such properties.

Question 3

Natural Selection

Answer 3

The differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in heritable traits of a population over time.