What variable force is most important to adaptation over time? ...

[lindiwe]

What variable force is most important to adaptation over time?
 
  a. founder effects
 b. genetic drift
 c. random mutation
  d. gene flow

Question 2

Stratigraphy is based on the assumption that layers are deposited in order thus, an artifact or fossil in a lower stratum is _____ one found in a higher stratum.
 
  a. the same age as
  b. older than
  c. younger than
  d. likely to be descended from
  e. likely to be unrelated to

[JCABRERA33]

Answer to Question 1

c

Answer to Question 2

b

[lindiwe]

Thanks for the timely response, appreciate it

[peter]

Gracias!