Term
A particular radioactive mineral has a half-life
of 500 million years. If a deposit of this material
presently has 12.5% of its radioactive form
remaining, how old is it? |
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Definition
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Term
If the frequency of the recessive allele (q) for a
particular gene in a population is .3, what
percentage of the individuals in the population
will be heterozygous for that gene? |
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Definition
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Term
Using the Hardy-Weinberg equation, the
frequency of the dominant phenotype in a
population would be designated by |
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Definition
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Term
When a population is suddenly reduced in size
due to an environmental catastrophe, it is
referred to as |
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Definition
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Term
The most accurate definition of microevolution
is |
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Definition
a change in allele frequencies in a
population over time |
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Term
During allopatric speciation, the first event is
usually |
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Definition
| geographic separation of two populations |
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Term
A comprehensive explanation for a large body
of factual information is called |
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Definition
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Term
A particular characteristic of an organism
that enhances its ability to survive or
reproduce is called |
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Definition
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Term
When a population experiences a period of
natural selection, the direct result is |
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Definition
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Term
A branch of a phylogenetic tree, representing
of a group of organisms descended from a
common ancestor, is called a |
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Definition
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Term
Natural selection may result in all of the
following except |
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Definition
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Term
A graphic representation of the pattern of
diversity in a group of organisms is called a |
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Definition
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Term
Because the transition period during which a
previous species evolves into a new one is often
very short, their fossil record displays a pattern
known as |
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Definition
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Term
Evolutionary change that does not involve the
appearance of new species is sometimes referred
to as |
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Definition
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Term
In relatively new island chains, a common
phenomenon is the evolution of a number of
closely-related species derived from a small
number of individuals that migrated from a
distant continent. This would is called |
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Definition
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Term
When several different color forms of an animal
fluctuate over time, but all remain in the
population for many generations, you probably
have |
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Definition
| frequency-dependent selection |
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Term
When we are able to recognize clearly defined
families, orders, phyla, etc., it is due primarily
to the macroevolutionary factor of |
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Definition
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Term
The unique set of environmental circumstances
to which a species is adapted is called its |
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Definition
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Term
A single female beetle loaded with fertilized
eggs lands on an island where her species has
not previously been found. A number of
things might result from this event, but the
most immediate would be |
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Definition
genetic drift in the population derived
from her offspring |
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Term
Which form of selection would most likely
help maintain a population in Hardy-
Weinberg equilibrium? |
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Definition
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Term
Which form of selection would most likely
help maintain a population in Hardy-
Weinberg equilibrium? |
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Definition
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Term
Life originated between 3.8 and 3.5 billion
years ago in the eon called the |
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Definition
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Term
All of the following were influences on Charles
Darwin as he developed his ideas on the
mechanism of evolution, except |
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Definition
Mendel’s work on the mechanisms of
genetics |
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Term
A system of organization and naming of
organisms, in which species are grouped into
genera, genera into families, etc |
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Definition
| hierarchical classification |
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Term
The “modern synthesis” refers to the
combination of Darwin’s ideas of natural
selection with modern |
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Definition
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Term
If a population of organisms remains close
to or at its carrying capacity over a long
period of time, which of the following would
necessarily be true? |
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Definition
the death rate will more-or-less equal the
birth rate |
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Term
the death rate will more-or-less equal the
birth rate |
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Definition
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Term
A reduced structure that no longer has a
function, but is similar to functional structures
in related organisms is specifically referred to as |
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Definition
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Term
Which of the following is a post-zygotic
reproductive barrier between closely related
species? |
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Definition
hybrid individuals are unable to form
functional gametes |
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Term
The Hardy-Weinberg principle of genetic
equilibrium tells us what to expect when a
sexually reproducing population is |
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Definition
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Term
Microevolutionary change can occur without
adaptation through |
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Definition
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Term
If you measured the frequency of alleles for a
particular gene among all individuals in a
population, and found that the frequency of
the recessive allele (q) was .5, but the
frequency of homozygous recessive genotypes
was nearly zero, what would you suspect is
happening? |
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Definition
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Term
Which of the following is not a factor that
would help maintain multiple alleles of genes
in a population? |
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Definition
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Term
Which of these factors is required in order for
evolution to begin, but does not cause
evolution to occur by itself? |
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Definition
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Term
Which of the following factors does not
increase genetic diversity in a population? |
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Definition
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Term
Which of the following factors does not
increase genetic diversity in a population? |
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Definition
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Term
Two species of flowering plants live together
and flower at the same time. They do not
hybridize because they each have a unique
pollinating insect. This is an example of a |
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Definition
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Term
Which part of natural selection is directly
related to the carrying capacity? |
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Definition
| limits to population growth |
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Term
Which statement about the human population is
most accurate? |
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Definition
| it is undergoing exponential growth |
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Term
Which of the following statements about the
fossil record is not true? |
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Definition
The remains of smaller organisms are
more likely to be found as fossils than
larger organisms |
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Term
Which of the following is a correct expression of
the Hardy-Weinberg equation? |
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Definition
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Term
Similar-looking structures found in two
different species are considered homologous if |
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Definition
the similarity is due to descent from a
common ancestor |
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