POB Exam 3 UARK Shadwick Latest
Exam with All Correct Answers 2025-
2026 Updated.
Biological Evolution - Answer organisms change over time
Darwin - Answer Theory of Natural Selection (short necked giraffes die and therefore, don't
reproduce)
Lamarck - Answer Inheritance of Acquired Characteristics (giraffes stretch their necks to
reach food and then their offspring are born with the longer neck)
Evidence of Evolution - Answer Fossils, Transitional Forms, Analogous Structures,
Homologous Structures, Vestigial Structures
Fossils - Answer hard body parts, embedded in sedimentary rock, deposited in Strata
Mold - Answer air space remains
Cast - Answer Silica fills space
Transitional Form - Answer Whale: reduced hind limbs and pelvic bones
Analogous Structure - Answer evolved separately but have similar functions ex. human and
octopi eyes
Homologous Structure - Answer similar structure but have different functions ex. arm, cat,
whale, bat
biochemical evidence of evolution - Answer DNA, ATP, enzymes are universal
Genetic Code evidence of evolution - Answer RNA to amino acid triplets are universal, many
genes are shared by all organisms
, who evolves - Answer populations
Hardy Weinberg Equilibrium - Answer No mutations, No genetic drift, No gene flow, No
natural selection, Random Mating
Mutation - Answer cause allele frequency in a populations, only source of variation, random
events
Genetic Drift - Answer causes allele frequency to fluctuate; greater in smaller populations
Bottleneck Effect - Answer catastrophe kills large amount of people, loss of genetic diversity;
recessive alleles become more present
Gene Flow - Answer movement of alleles between populations; mixes genetic diversity in a
populations; makes two pools or more similar populations similar
Random Mating - Answer individuals do not choose mates, never observed in natural
population
Natural Selection - Answer heritable variation, over-reproduction causes competition and
differ in reproductive success and fitness, Adaptation
Natural Selection: Stabilizing Selection - Answer select against extremes
Natural Selection: Directional selection - Answer one extreme is favored
Natural Selection: Disruptive Selection - Answer both extremes favored
Macroevolution - Answer speciation and divergence of life
Speciation - Answer group of organisms capable of interbreeding
Habitat Isolation - Answer Pre zygotic; Same environment, different niche
Exam with All Correct Answers 2025-
2026 Updated.
Biological Evolution - Answer organisms change over time
Darwin - Answer Theory of Natural Selection (short necked giraffes die and therefore, don't
reproduce)
Lamarck - Answer Inheritance of Acquired Characteristics (giraffes stretch their necks to
reach food and then their offspring are born with the longer neck)
Evidence of Evolution - Answer Fossils, Transitional Forms, Analogous Structures,
Homologous Structures, Vestigial Structures
Fossils - Answer hard body parts, embedded in sedimentary rock, deposited in Strata
Mold - Answer air space remains
Cast - Answer Silica fills space
Transitional Form - Answer Whale: reduced hind limbs and pelvic bones
Analogous Structure - Answer evolved separately but have similar functions ex. human and
octopi eyes
Homologous Structure - Answer similar structure but have different functions ex. arm, cat,
whale, bat
biochemical evidence of evolution - Answer DNA, ATP, enzymes are universal
Genetic Code evidence of evolution - Answer RNA to amino acid triplets are universal, many
genes are shared by all organisms
, who evolves - Answer populations
Hardy Weinberg Equilibrium - Answer No mutations, No genetic drift, No gene flow, No
natural selection, Random Mating
Mutation - Answer cause allele frequency in a populations, only source of variation, random
events
Genetic Drift - Answer causes allele frequency to fluctuate; greater in smaller populations
Bottleneck Effect - Answer catastrophe kills large amount of people, loss of genetic diversity;
recessive alleles become more present
Gene Flow - Answer movement of alleles between populations; mixes genetic diversity in a
populations; makes two pools or more similar populations similar
Random Mating - Answer individuals do not choose mates, never observed in natural
population
Natural Selection - Answer heritable variation, over-reproduction causes competition and
differ in reproductive success and fitness, Adaptation
Natural Selection: Stabilizing Selection - Answer select against extremes
Natural Selection: Directional selection - Answer one extreme is favored
Natural Selection: Disruptive Selection - Answer both extremes favored
Macroevolution - Answer speciation and divergence of life
Speciation - Answer group of organisms capable of interbreeding
Habitat Isolation - Answer Pre zygotic; Same environment, different niche
