UW BIO 180 Exam 1 Questions and Answers 2026/2027 | A+ Grade |
Comprehensive Study Guide|BIO 180 – Introductory Biology: Principles of
Life Sciences (University of Washington)
Organism - (ANSWER)A living entity made up of one or more cells
Theory - (ANSWER)An explanation for a very general class of phenomena or observations
Cell Theory - (ANSWER)All organisms are made of cells and all cells come from preexisting cells
Null Hypothesis - (ANSWER)Specifies what we should observe when the hypothesis being tested isn't
correct
Control Group - (ANSWER)A group that checks for other factors which are not being tested
Two components of scientific theories - (ANSWER)Pattern and process
Population - (ANSWER)Individuals of the same species that are living in the same area at the same time
Descent with modification - (ANSWER)Evolution
Pattern component of Evolution - (ANSWER)1) Species change through time
2) Species are related through common ancestry
Fossil Record - (ANSWER)All fossils that have been found and described in the scientific literature
Extant Species - (ANSWER)Living species
Extinct Species - (ANSWER)No longer existing species
, UW BIO 180 Exam 1 Questions and Answers 2026/2027 | A+ Grade |
Comprehensive Study Guide|BIO 180 – Introductory Biology: Principles of
Life Sciences (University of Washington)
Transitional Feature - (ANSWER)A trait in a fossil species that is intermediate between those of older and
younger species
Vestigial Trait - (ANSWER)A reduced or incompletely developed structure that has no function or
reduced function but is clearly similar to functioning organs or structures in closely related species
Phylogeny - (ANSWER)A family tree of populations or species
Homology - (ANSWER)Similarity that exists in species because they both inherited the trait from a
common ancestor
Genetic Homology - (ANSWER)Similarity having to do with similar DNA structuring
Developmental Homology - (ANSWER)Similarity in the embryonic stage
Structural Homology - (ANSWER)Similarity in adult morphology (form)
Darwin's Four Postulates - (ANSWER)1) Individuals vary in the traits they posses
2) Some trait differences are heritable
3) More offspring are produced than can possibly survive in one generation
4) The individuals who survive best and produce the most offspring is not a random subset of the
population
Theory of Evolution by Natural Selection (in two parts) - (ANSWER)1) Heritable variation leads to...
2) Differential reproductive success
Comprehensive Study Guide|BIO 180 – Introductory Biology: Principles of
Life Sciences (University of Washington)
Organism - (ANSWER)A living entity made up of one or more cells
Theory - (ANSWER)An explanation for a very general class of phenomena or observations
Cell Theory - (ANSWER)All organisms are made of cells and all cells come from preexisting cells
Null Hypothesis - (ANSWER)Specifies what we should observe when the hypothesis being tested isn't
correct
Control Group - (ANSWER)A group that checks for other factors which are not being tested
Two components of scientific theories - (ANSWER)Pattern and process
Population - (ANSWER)Individuals of the same species that are living in the same area at the same time
Descent with modification - (ANSWER)Evolution
Pattern component of Evolution - (ANSWER)1) Species change through time
2) Species are related through common ancestry
Fossil Record - (ANSWER)All fossils that have been found and described in the scientific literature
Extant Species - (ANSWER)Living species
Extinct Species - (ANSWER)No longer existing species
, UW BIO 180 Exam 1 Questions and Answers 2026/2027 | A+ Grade |
Comprehensive Study Guide|BIO 180 – Introductory Biology: Principles of
Life Sciences (University of Washington)
Transitional Feature - (ANSWER)A trait in a fossil species that is intermediate between those of older and
younger species
Vestigial Trait - (ANSWER)A reduced or incompletely developed structure that has no function or
reduced function but is clearly similar to functioning organs or structures in closely related species
Phylogeny - (ANSWER)A family tree of populations or species
Homology - (ANSWER)Similarity that exists in species because they both inherited the trait from a
common ancestor
Genetic Homology - (ANSWER)Similarity having to do with similar DNA structuring
Developmental Homology - (ANSWER)Similarity in the embryonic stage
Structural Homology - (ANSWER)Similarity in adult morphology (form)
Darwin's Four Postulates - (ANSWER)1) Individuals vary in the traits they posses
2) Some trait differences are heritable
3) More offspring are produced than can possibly survive in one generation
4) The individuals who survive best and produce the most offspring is not a random subset of the
population
Theory of Evolution by Natural Selection (in two parts) - (ANSWER)1) Heritable variation leads to...
2) Differential reproductive success
