BIOL 133 CHAPTER 20 | COMPREHENSIVE BIOLOGY STUDY GUIDE, PRACTICE
QUESTIONS & ANSWERS 2026/2027
What is the proper way of writing the scientific name for humans?
A. homo sapiens
B. Homo Sapiens
C. homo Sapiens
D. (italics) Homo sapiens
E. (italics) Homo Sapiens - ANS ✔✔D. (italics) Homo sapiens
In homologous structures like the wings of a bat and the wings of a bird, it isn't just the wings that make
them homologous. It is due to the more complicated:
A. skin and follicle covering
B. number and arrangement of bones
C. blood vessel and lymph circulation
D. distance from trunk and width of appendage - ANS ✔✔B. number and arrangement of bones
What type of event is usually associated with each branch on a phylogenetic tree?
A. morphological convergence
B. mutational disruption
C. the evolution of a new feature
D. the formation of a vestigial structure - ANS ✔✔C. the evolution of a new feature
The only taxonomic name not capitalized is the:
A. domain
B. kingdom
C. species
D. genus
E. family - ANS ✔✔C. species
Organisms in a specific clade would not only have structural features in common, but what other types
of features?
A. same number of genes
B. molecular
C. habitat
D. behaviors - ANS ✔✔B. molecular
Evidence has been gathered over the years that indicate mitochondria and chloroplasts were once
bacteria. This idea is termed:
A. the eukaryote-first hypothesis
B. the origins issue
C. the endosymbiont theory
D. the web of life - ANS ✔✔C. the endosymbiont theory
Since phylogenetic trees are essentially ___, they are subject to revision as new information is obtained.
A. hypotheses
QUESTIONS & ANSWERS 2026/2027
What is the proper way of writing the scientific name for humans?
A. homo sapiens
B. Homo Sapiens
C. homo Sapiens
D. (italics) Homo sapiens
E. (italics) Homo Sapiens - ANS ✔✔D. (italics) Homo sapiens
In homologous structures like the wings of a bat and the wings of a bird, it isn't just the wings that make
them homologous. It is due to the more complicated:
A. skin and follicle covering
B. number and arrangement of bones
C. blood vessel and lymph circulation
D. distance from trunk and width of appendage - ANS ✔✔B. number and arrangement of bones
What type of event is usually associated with each branch on a phylogenetic tree?
A. morphological convergence
B. mutational disruption
C. the evolution of a new feature
D. the formation of a vestigial structure - ANS ✔✔C. the evolution of a new feature
The only taxonomic name not capitalized is the:
A. domain
B. kingdom
C. species
D. genus
E. family - ANS ✔✔C. species
Organisms in a specific clade would not only have structural features in common, but what other types
of features?
A. same number of genes
B. molecular
C. habitat
D. behaviors - ANS ✔✔B. molecular
Evidence has been gathered over the years that indicate mitochondria and chloroplasts were once
bacteria. This idea is termed:
A. the eukaryote-first hypothesis
B. the origins issue
C. the endosymbiont theory
D. the web of life - ANS ✔✔C. the endosymbiont theory
Since phylogenetic trees are essentially ___, they are subject to revision as new information is obtained.
A. hypotheses
