Complete the selection modes

Exercise and reference answers

Missing parts

1. Answer

   directional

   Choices

   1. directional
   2. diversifying
   3. stabilizing

2. Answer

   diversifying

   Choices

   1. diversifying
   2. directional
   3. stabilizing

3. Answer

   frequency-dependent

   Choices

   1. frequency-dependent
   2. stabilizing
   3. directional

Complete the statement

Selection for one extreme is {0}, selection for two extremes at once is {1}, and selection that favours common or rare forms is {2}.

Instructions

Tap a word for each blank to complete the sentence.

Explanation