BIO – 200 HARD QUESTIONS & ANSWERS
|POPULATION, BEHAVIOR &
BIODIVERSITY|2026 LATTEST QUESTION
AND CORRECT ANWSERS
EVOLUTION (Q1–50)
1. Evolution operates at the level of → Population
2. Selection acts directly on → Phenotype
3. New alleles originate from → Mutation
4. Gene flow effect → Homogenizes populations
5. Drift strongest when → Population small
6. Bottleneck consequence → Loss of variation
7. Founder effect cause → Small colonizing group
8. Fitness measured by → Reproductive success
9. Stabilizing selection reduces → Variance
10. Directional selection shifts → Mean trait value
11. Disruptive selection → Bimodal distribution
12. Sexual selection favors → Mating traits
13. Speciation requires → Isolation
14. Allopatric speciation → Geographic separation
, 15. Sympatric speciation → No barrier
16. Prezygotic isolation → Before fertilization
17. Postzygotic isolation → After fertilization
18. Hybrid sterility → Infertile offspring
19. Adaptive radiation → Rapid diversification
20. Convergent evolution → Analogous traits
21. Divergent evolution → Homologous traits
22. Vestigial structures → Reduced function
23. Clade definition → Ancestor + descendants
24. Monophyletic group → Complete clade
25. Paraphyletic group → Missing members
26. Polyphyletic group → Unrelated
27. Molecular clock → Mutation rate timing
28. Hardy-Weinberg assumes → No evolution
29. HW requires → Random mating
30. If p=0.7 → q = 0.3
31. Genetic drift leads to → Fixation/loss
32. Selection coefficient measures → Fitness difference
33. Balanced polymorphism → Multiple alleles persist
34. Heterozygote advantage → Higher fitness
35. Frequency-dependent selection → Depends on frequency
|POPULATION, BEHAVIOR &
BIODIVERSITY|2026 LATTEST QUESTION
AND CORRECT ANWSERS
EVOLUTION (Q1–50)
1. Evolution operates at the level of → Population
2. Selection acts directly on → Phenotype
3. New alleles originate from → Mutation
4. Gene flow effect → Homogenizes populations
5. Drift strongest when → Population small
6. Bottleneck consequence → Loss of variation
7. Founder effect cause → Small colonizing group
8. Fitness measured by → Reproductive success
9. Stabilizing selection reduces → Variance
10. Directional selection shifts → Mean trait value
11. Disruptive selection → Bimodal distribution
12. Sexual selection favors → Mating traits
13. Speciation requires → Isolation
14. Allopatric speciation → Geographic separation
, 15. Sympatric speciation → No barrier
16. Prezygotic isolation → Before fertilization
17. Postzygotic isolation → After fertilization
18. Hybrid sterility → Infertile offspring
19. Adaptive radiation → Rapid diversification
20. Convergent evolution → Analogous traits
21. Divergent evolution → Homologous traits
22. Vestigial structures → Reduced function
23. Clade definition → Ancestor + descendants
24. Monophyletic group → Complete clade
25. Paraphyletic group → Missing members
26. Polyphyletic group → Unrelated
27. Molecular clock → Mutation rate timing
28. Hardy-Weinberg assumes → No evolution
29. HW requires → Random mating
30. If p=0.7 → q = 0.3
31. Genetic drift leads to → Fixation/loss
32. Selection coefficient measures → Fitness difference
33. Balanced polymorphism → Multiple alleles persist
34. Heterozygote advantage → Higher fitness
35. Frequency-dependent selection → Depends on frequency
