Name the type of isolation mechanism that is operating: Lollipop shrimp males would try to mate with candycane shrimp females, but the lollipop males' claws aren't the right shape to hold the candycane females during courtship/mating.

MCQs on how organisms evolve over time, with particular emphasis on natural selection, evolution, speciation, phylogeny and taxonomy, and aspects of genetics and inheritance. As well as the study of population ecology and ecosystems.