Question
Complete the speciation concept map by placing these labels in the correct blanks:- morphological species concept- biological species concept- reproductive isolation- allopatric speciation- sympatric speciation- hybrid zones- reinforcementUse the clues about body structures, successful interbreeding, geographic separation, speciation without geographic separation, contact between related species, and the effect of low-fitness hybrids. Briefly explain each placement.
Completed concept map
- Morphological species concept belongs with distinct body structures. It identifies species using observable structural differences.
- Biological species concept belongs with the definition based on whether populations can interbreed and produce viable, fertile offspring.
- Reproductive isolation names the barrier that prevents successful gene flow through mating between populations.
- Allopatric speciation belongs on the pathway where geographic separation interrupts gene flow and the isolated populations diverge.
- Sympatric speciation belongs on the pathway where reproductive isolation develops without geographic separation, for example through polyploidy, habitat differentiation, or sexual selection.
- Hybrid zones are the contact areas where closely related species meet, mate, and produce hybrid offspring.
- Reinforcement is the outcome favored when hybrids have lower fitness. Natural selection then favors stronger reproductive barriers, reducing future hybridization.
Together, the map moves from ways of defining species, to pathways that create species, to what can happen when diverged populations meet again.
Evidence boundary
The source is a drag-and-drop concept map. This page transcribes its seven labels and logical relationships into text rather than reproducing the proprietary interactive artwork. The placements follow the version shown in the cited prompt. Broader exceptions to species concepts and every possible mechanism of speciation are outside this question's scope.
Sources
These references support the concepts and methods used in the explanation above.