Zoology Exam 1 Questions and
Answers Latest Update
Darwins Evolutionary theory of Natural Selection. - Answer-The observation of why
things change, providing explanation for origins of adaptation. This theory speaks of
reproductive success and survival with limited natural resources due to an organisms
advantageous genetic traits as well as population growth from this.
Random, Non-Random
Random, Non-Random - Answer-Two Components of natural selections are either
___________ or ____________
Production of VARIATION among organisms is ___________. The ____________
components include survival of different traits, and differential survival and
reproduction.
Populations Change.
Unequal Reproduction. - Answer-What is the 2 word definition for evolution?
What about the 2 word definition for Natural Selection?
Homologus - Answer-________ means related or from common decent. (dealing
with traits)
Phylogenetic Tree - Answer-A chart showing evolutionary relationships as
determined by evolutionary systematics. It contains a time component and implies
ancestor-descendant relationships.
Analogy - Answer-A similarity that comes about separately.
Speciation - Answer-A process typically caused by the genetic isolation from a main
population resulting in a new genetically distinct species.
Multiplication of species - Answer-A branch point in the evolutionary tree, it occurs
when an ancestrial species has split into two different ones by factors such as
geographical splitting followed by evolutionary divergence of the separate parts.
Allopatric speciation - Answer-The formation of a new species as a result of an
ancestral population's becoming isolated by a geographic barrier.
Vicariant speciation - Answer-when a physical barrier that creates large,
geographically separated populations that diverge into separate species, that is
called..
Founder Effect - Answer-Genetic drift that occurs when a few individuals become
isolated from a larger population and form a new population whose gene pool
composition is not reflective of that of the original population.
, Sympatric speciation - Answer-A hypothesis stating individuals can speciate while
living in different components of the environment, individuals within a species
become specialized for occupying different components of the environment.
population genetics - Answer-Studies evolution as change in gene frequencies in
population.
Microevolution - Answer-Evolutionary changes in frequencies of different allelic
forms of genes.
Macroevolution - Answer-Evolution on a grand scale, Origins of new structures and
designs, trends, mass extinctions ect.
Stabilizing selection - Answer-Selects against extreme phenotypes
Directional selection - Answer-Phenotypic character shifts in one direction
Disruptive Selection - Answer-Selects against average phenotypes
Richard Owen - Answer-__________ described homology as "the same organ in
different organisms under every variety of form and function"
Speciation , Millions - Answer-__________Links Macroevolution to microevolution,
rates of this and extinction are measured in __________of years.
Five - Answer-How many dramatic Mass extinctions are we aware of?
The Permian Extinction - Answer-225 million years ago, half of the families of
shallow water invertebrates and 90% of marine invertebrates disappeared. This was
called _______________
The Cretaceous Extinction - Answer-65 million years ago Marked the end of the
dinosaurs and many other taxa. This was called _______________
Become extinct or give rise to a new species - Answer-What are the 2 possible fates
that a species can have?
Heterochrony - Answer-Evolutionary change in the timing or rate of an organism's
development leading to changes in size and shape
Paedomorphosis - Answer-The retention in an adult organism of the juvenile features
of its evolutionary ancestors.
Isolecithal,
Mesolecithal,
Telolecithal,
Centrolecithal - Answer-__________= Little Yolk,
__________= Medium yolk at vegetal pole,
__________= Lots of yolk at vegetal pole,
__________= Large, Central Yolk
Answers Latest Update
Darwins Evolutionary theory of Natural Selection. - Answer-The observation of why
things change, providing explanation for origins of adaptation. This theory speaks of
reproductive success and survival with limited natural resources due to an organisms
advantageous genetic traits as well as population growth from this.
Random, Non-Random
Random, Non-Random - Answer-Two Components of natural selections are either
___________ or ____________
Production of VARIATION among organisms is ___________. The ____________
components include survival of different traits, and differential survival and
reproduction.
Populations Change.
Unequal Reproduction. - Answer-What is the 2 word definition for evolution?
What about the 2 word definition for Natural Selection?
Homologus - Answer-________ means related or from common decent. (dealing
with traits)
Phylogenetic Tree - Answer-A chart showing evolutionary relationships as
determined by evolutionary systematics. It contains a time component and implies
ancestor-descendant relationships.
Analogy - Answer-A similarity that comes about separately.
Speciation - Answer-A process typically caused by the genetic isolation from a main
population resulting in a new genetically distinct species.
Multiplication of species - Answer-A branch point in the evolutionary tree, it occurs
when an ancestrial species has split into two different ones by factors such as
geographical splitting followed by evolutionary divergence of the separate parts.
Allopatric speciation - Answer-The formation of a new species as a result of an
ancestral population's becoming isolated by a geographic barrier.
Vicariant speciation - Answer-when a physical barrier that creates large,
geographically separated populations that diverge into separate species, that is
called..
Founder Effect - Answer-Genetic drift that occurs when a few individuals become
isolated from a larger population and form a new population whose gene pool
composition is not reflective of that of the original population.
, Sympatric speciation - Answer-A hypothesis stating individuals can speciate while
living in different components of the environment, individuals within a species
become specialized for occupying different components of the environment.
population genetics - Answer-Studies evolution as change in gene frequencies in
population.
Microevolution - Answer-Evolutionary changes in frequencies of different allelic
forms of genes.
Macroevolution - Answer-Evolution on a grand scale, Origins of new structures and
designs, trends, mass extinctions ect.
Stabilizing selection - Answer-Selects against extreme phenotypes
Directional selection - Answer-Phenotypic character shifts in one direction
Disruptive Selection - Answer-Selects against average phenotypes
Richard Owen - Answer-__________ described homology as "the same organ in
different organisms under every variety of form and function"
Speciation , Millions - Answer-__________Links Macroevolution to microevolution,
rates of this and extinction are measured in __________of years.
Five - Answer-How many dramatic Mass extinctions are we aware of?
The Permian Extinction - Answer-225 million years ago, half of the families of
shallow water invertebrates and 90% of marine invertebrates disappeared. This was
called _______________
The Cretaceous Extinction - Answer-65 million years ago Marked the end of the
dinosaurs and many other taxa. This was called _______________
Become extinct or give rise to a new species - Answer-What are the 2 possible fates
that a species can have?
Heterochrony - Answer-Evolutionary change in the timing or rate of an organism's
development leading to changes in size and shape
Paedomorphosis - Answer-The retention in an adult organism of the juvenile features
of its evolutionary ancestors.
Isolecithal,
Mesolecithal,
Telolecithal,
Centrolecithal - Answer-__________= Little Yolk,
__________= Medium yolk at vegetal pole,
__________= Lots of yolk at vegetal pole,
__________= Large, Central Yolk
