5. Ecology and Evolution

Speciation — Quiz

Test your understanding of speciation with 5 practice questions.

Practice Questions

Question 1

Given two species exhibit $4\%$ neutral sequence divergence and the neutral mutation rate is $r=1\times10^{-9}$ substitutions per site per year, estimate the time since they diverged, assuming divergence accumulates equally in both lineages.

Question 2

Which prezygotic reproductive isolating mechanism is exemplified by sea urchin species that release gametes into water but prevent cross-fertilization through species-specific gamete recognition proteins?

Question 3

Which term describes speciation resulting from the physical separation of populations by a geographical barrier, such as mountain formation or river emergence?

Question 4

Hybrid speciation that occurs at the same ploidy level without genome duplication, such as the formation of certain Helianthus sunflower species, is known as:

Question 5

Which species concept defines species based solely on morphological differences and the grouping of individuals by shared physical traits?