True.
Tertiary sources compile and summarize secondary sources. Examples: reference publications such as encyclopedias, bibliographies, or handbooks
Answer: <em>The Bottleneck Effect</em>
Explanation:
A Bottleneck effect is the sharp reduction of numbers of a population through environmental effects or human activity. It causes a loss of the genetic pool and its variety; genetic variation lowers and increases with time as random mutations occur.
convection currents in the atmospere
