Upgrade to remove ads
Only $35.99/year

BIO112 Ch.24

Terms in this set (10)

The evolution of one species into two or more species is called:

a.) Gradualism
b.) Punctuated Equilibrium
c.) Cladogenesis
d.) Horizontal Gene Transfer
e.) Microevolution
C.) Cladogenesis
The large number of honeycreeper species on the Hawaiian Islands is an example of

a.) Adaptive Radiation
b.) Genetic Drift
c.) Stabilizing Selection
d) Horizontal Genetransfer
e.) Microevolution
A.) Adaptive Radiation
A major mechanism of speciation in plants but not in animals is

a.) Adaptation to new environments
b.) Polyploidy
c.) Hybrid Breakdown
d.) Genetic changes that alter the organism's niche
e.) Both a and d
B.) Polyploidy
The concept of punctuated equilibrium suggests that

a.) The rate of evolution is consistent, with short time periods of evolutionary change
b.) Evolution occurs gradually over time
c.) Small genetic changes accumulate over time to allow for phenotypic change and speciation
d.) Long periods of little evolutionary change are interrupted by short periods of major evolutionary change
e.) Both b and
D.) Long periods of little evolutionary change are interrupted by short periods of major evolutionary change
Researchers suggest that an increase in the number of Hox genes

a.) Leads to reproductive isolation in all cases.
b.) Could explain the evolution of color vision.
c.) Allows for the evolution of more complex body patterns in animals.
d.) Results in the decrease in the number of body segments in insects.
e.) Does all of the above.
C.) Allows for the evolution of more complex body patterns in animals.
The observation that the mammalian Pax6 gene and the Drosophila eyeless gene are homologous genes that promote the formation of different types of eyes suggests that

a.) Drosophila eyes are more complex
b.) Mammalian eyes are more complex
c.) Eyes arose once during evolution
d.) Eyes arose at least twice during evolution
e.) Eye development is a simple process
C.) Eyes arose once during evolution.
Hybrid breakdown occurs when interspecies hybrids

a.) Do not develop past the early embryonic stages.
b.) Have a reduced life span.
c.) Are infertile.
d.) Are fertile but produce offspring with reduced viability and fertility.
e.) Produce offspring that express the traits of only one of the original species.
D.) Are fertile but produce offspring with reduced viability and fertility.
Which of the following is considered an example of a postzygotic isolating mechanism?

a.) Incompatible genitalia
b.) Different mating seasons
c.) Incompatible gametes
d.) Mountain range separating two populations
e.) Failure of fertilized eggs to develop normally
E.) Failure of fertilized eggs to develop normally
The biological species concept classifies a species based on

a.) Morphological Characteristics.
b.) Reproductive Isolation.
c.) The niche the organism occupies in the environment.
d.) Genetic relationships between an organism and its ancestors.
e.) Both a and b.
B.) Reproductive Isolation
Macroevolution refers to evolutionary changes that
a.) Occur in multicellular organisms.
b.) Produce new species and groups of species.
c.) Occur over long periods of time.
d.) Cause changes in allele frequencies.
e.) Occur in large mammals.
B.) Produce new species and groups of species
Other sets by this creator