2026 BIOD 102 Module 1-6 / And Final Exam Portage Learning
Questions and Answers 2026
1. Which scientist developed the two-part naming system known as Binomial
Nomenclature?
A. Charles Darwin
B. Carl Linnaeus
C. Gregor Mendel
D. Louis Pasteur
Rationale: Linnaeus created the standardized system using Genus and species to
identify organisms.
2. Which of the following is the correct order of the taxonomic hierarchy from
broadest to most specific?
A. Kingdom, Phylum, Domain, Class
B. Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species
C. Species, Genus, Family, Order, Class, Phylum, Kingdom, Domain
D. Phylum, Kingdom, Domain, Order, Class, Family, Genus, Species
Rationale: Domain is the most inclusive category; Species is the most exclusive.
3. In a phylogenetic tree, what does a "Node" (Branch Point) represent?
A. A single species
B. The most recent common ancestor of descending lineages
C. An extinct organism
D. The root of the tree
Rationale: A node indicates where one evolutionary lineage split into two.
4. Which domain contains organisms with membrane-bound organelles and a
nucleus?
A. Bacteria
B. Archaea
C. Eukarya
D. Monera
Rationale: Eukarya includes plants, animals, fungi, and protists; the other domains are
prokaryotic.
5. "Sister Taxa" are defined as organisms that:
A. Are unrelated
B. Share an immediate common ancestor not shared by other groups
2026 Question And ANSWER Latest Update
,C. Live in the same habitat
D. Look identical
Rationale: Sister taxa are each other's closest relatives on a phylogenetic tree.
6. A "Shared Ancestral Character" is a trait that:
A. Is unique to a specific clade
B. Originated in an ancestor of the taxon
C. Was recently mutated
D. Is only found in humans
Rationale: A shared ancestral character is a trait held by the clade and its ancestors
(e.g., backbone in mammals).
7. Which of the following is the correct way to write a scientific name?
A. homo sapiens
B. Homo sapiens (Italicized)
C. HOMO SAPIENS
D. Homo Sapiens
Rationale: The Genus is capitalized, the species is lowercase, and the entire name
must be italicized or underlined.
8. "Analogy" (Homoplasy) refers to structures that are similar due to:
A. Common ancestry
B. Convergent evolution (similar environmental pressures)
C. Random mutation
D. Horizontal gene transfer
Rationale: Analogous structures (like bat wings and butterfly wings) evolve
independently.
9. "Homology" refers to structures that are similar due to:
A. Convergent evolution
B. Common ancestry
C. Living in water
D. Eating the same food
Rationale: Homologous structures (like a human arm and a whale flipper) indicate a
shared ancestor.
10. A "Monophyletic" group (Clade) includes:
A. An ancestor and some of its descendants
B. An ancestral species and all of its descendants
C. Multiple ancestors but no descendants
D. Only living species
2026 Question And ANSWER Latest Update
,Rationale: A true clade must be monophyletic, containing the ancestor
and all branches.
11. A "Paraphyletic" group consists of:
A. All descendants of an ancestor
B. An ancestral species and some, but not all, of its descendants
C. Unrelated species
D. Only extinct species
Rationale: Paraphyletic groups are often considered "incomplete" clades in modern
systematics.
12. "Maximum Parsimony" is a principle used to choose the tree that:
A. Is the most complex
B. Requires the fewest evolutionary changes
C. Has the most branches
D. Was discovered first
Rationale: Parsimony suggests the simplest explanation (fewest character changes) is
most likely correct.
13. Which prokaryotic domain is known for having branched membrane lipids and
living in extreme environments?
A. Bacteria
B. Archaea
C. Eukarya
D. Cyanobacteria
Rationale: Archaea possess unique membrane chemistry that allows them to survive
as extremophiles.
14. What is the primary difference between a "Phylogenetic Tree" and a
"Cladogram"?
A. There is no difference
B. Phylogenetic trees show branch lengths proportional to time or change
C. Cladograms are only for plants
D. Trees are for extinct animals only
Rationale: While both show relationships, phylogenetic trees often provide additional
data on the degree of divergence.
15. "Horizontal Gene Transfer" (HGT) complicates the tree of life because:
A. It only happens in humans
B. Genes are moved between different species, not just parent to offspring
C. It stops evolution
2026 Question And ANSWER Latest Update
, D. It only happens in the ocean
Rationale: HGT means the "tree" of life often looks more like a "web" of interconnected
lineages.
16. Which of the following is NOT one of the three domains of life?
A. Bacteria
B. Archaea
C. Eukarya
D. Protista
Rationale: Protista is a kingdom (often debated) within the domain Eukarya.
17. "Systematics" is the study of:
A. Only naming animals
B. Classifying organisms and determining their evolutionary relationships
C. Dissecting plants
D. Bacterial growth rates
Rationale: Systematics combines taxonomy with the study of phylogeny.
18. A "Basal Taxon" is a lineage that:
A. Is the most evolved
B. Diverged early in the history of the group and remains near the root
C. Is extinct
D. Has the most mutations
Rationale: Basal taxa help identify the early ancestral state of a group.
19. What is a "Polytomy" on a phylogenetic tree?
A. A single branch
B. A branch point from which more than two descendant groups emerge
C. The root of the tree
D. A dead end
Rationale: A polytomy indicates that the evolutionary relationship among the groups is
not yet clear.
20. In binomial nomenclature, the first part of the name is the:
A. Family
B. Genus
C. Species
D. Order
Rationale: The Genus comes first and is always capitalized.
21. "Molecular Clocks" are used to estimate:
A. The weight of an animal
2026 Question And ANSWER Latest Update
Questions and Answers 2026
1. Which scientist developed the two-part naming system known as Binomial
Nomenclature?
A. Charles Darwin
B. Carl Linnaeus
C. Gregor Mendel
D. Louis Pasteur
Rationale: Linnaeus created the standardized system using Genus and species to
identify organisms.
2. Which of the following is the correct order of the taxonomic hierarchy from
broadest to most specific?
A. Kingdom, Phylum, Domain, Class
B. Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species
C. Species, Genus, Family, Order, Class, Phylum, Kingdom, Domain
D. Phylum, Kingdom, Domain, Order, Class, Family, Genus, Species
Rationale: Domain is the most inclusive category; Species is the most exclusive.
3. In a phylogenetic tree, what does a "Node" (Branch Point) represent?
A. A single species
B. The most recent common ancestor of descending lineages
C. An extinct organism
D. The root of the tree
Rationale: A node indicates where one evolutionary lineage split into two.
4. Which domain contains organisms with membrane-bound organelles and a
nucleus?
A. Bacteria
B. Archaea
C. Eukarya
D. Monera
Rationale: Eukarya includes plants, animals, fungi, and protists; the other domains are
prokaryotic.
5. "Sister Taxa" are defined as organisms that:
A. Are unrelated
B. Share an immediate common ancestor not shared by other groups
2026 Question And ANSWER Latest Update
,C. Live in the same habitat
D. Look identical
Rationale: Sister taxa are each other's closest relatives on a phylogenetic tree.
6. A "Shared Ancestral Character" is a trait that:
A. Is unique to a specific clade
B. Originated in an ancestor of the taxon
C. Was recently mutated
D. Is only found in humans
Rationale: A shared ancestral character is a trait held by the clade and its ancestors
(e.g., backbone in mammals).
7. Which of the following is the correct way to write a scientific name?
A. homo sapiens
B. Homo sapiens (Italicized)
C. HOMO SAPIENS
D. Homo Sapiens
Rationale: The Genus is capitalized, the species is lowercase, and the entire name
must be italicized or underlined.
8. "Analogy" (Homoplasy) refers to structures that are similar due to:
A. Common ancestry
B. Convergent evolution (similar environmental pressures)
C. Random mutation
D. Horizontal gene transfer
Rationale: Analogous structures (like bat wings and butterfly wings) evolve
independently.
9. "Homology" refers to structures that are similar due to:
A. Convergent evolution
B. Common ancestry
C. Living in water
D. Eating the same food
Rationale: Homologous structures (like a human arm and a whale flipper) indicate a
shared ancestor.
10. A "Monophyletic" group (Clade) includes:
A. An ancestor and some of its descendants
B. An ancestral species and all of its descendants
C. Multiple ancestors but no descendants
D. Only living species
2026 Question And ANSWER Latest Update
,Rationale: A true clade must be monophyletic, containing the ancestor
and all branches.
11. A "Paraphyletic" group consists of:
A. All descendants of an ancestor
B. An ancestral species and some, but not all, of its descendants
C. Unrelated species
D. Only extinct species
Rationale: Paraphyletic groups are often considered "incomplete" clades in modern
systematics.
12. "Maximum Parsimony" is a principle used to choose the tree that:
A. Is the most complex
B. Requires the fewest evolutionary changes
C. Has the most branches
D. Was discovered first
Rationale: Parsimony suggests the simplest explanation (fewest character changes) is
most likely correct.
13. Which prokaryotic domain is known for having branched membrane lipids and
living in extreme environments?
A. Bacteria
B. Archaea
C. Eukarya
D. Cyanobacteria
Rationale: Archaea possess unique membrane chemistry that allows them to survive
as extremophiles.
14. What is the primary difference between a "Phylogenetic Tree" and a
"Cladogram"?
A. There is no difference
B. Phylogenetic trees show branch lengths proportional to time or change
C. Cladograms are only for plants
D. Trees are for extinct animals only
Rationale: While both show relationships, phylogenetic trees often provide additional
data on the degree of divergence.
15. "Horizontal Gene Transfer" (HGT) complicates the tree of life because:
A. It only happens in humans
B. Genes are moved between different species, not just parent to offspring
C. It stops evolution
2026 Question And ANSWER Latest Update
, D. It only happens in the ocean
Rationale: HGT means the "tree" of life often looks more like a "web" of interconnected
lineages.
16. Which of the following is NOT one of the three domains of life?
A. Bacteria
B. Archaea
C. Eukarya
D. Protista
Rationale: Protista is a kingdom (often debated) within the domain Eukarya.
17. "Systematics" is the study of:
A. Only naming animals
B. Classifying organisms and determining their evolutionary relationships
C. Dissecting plants
D. Bacterial growth rates
Rationale: Systematics combines taxonomy with the study of phylogeny.
18. A "Basal Taxon" is a lineage that:
A. Is the most evolved
B. Diverged early in the history of the group and remains near the root
C. Is extinct
D. Has the most mutations
Rationale: Basal taxa help identify the early ancestral state of a group.
19. What is a "Polytomy" on a phylogenetic tree?
A. A single branch
B. A branch point from which more than two descendant groups emerge
C. The root of the tree
D. A dead end
Rationale: A polytomy indicates that the evolutionary relationship among the groups is
not yet clear.
20. In binomial nomenclature, the first part of the name is the:
A. Family
B. Genus
C. Species
D. Order
Rationale: The Genus comes first and is always capitalized.
21. "Molecular Clocks" are used to estimate:
A. The weight of an animal
2026 Question And ANSWER Latest Update
