EMORY NBB 201 - EXAM 1 QUESTIONS WITH
ACCURATE ANSWERS
Lamarck's Theory - ANSWER Variation is acquired and then passed on (wrong but
scientific, ie falsifiable)
Malthus - ANSWER Population growth theory
Darwin's 3 Observations and 2 Deductions - ANSWER Obs 1: All organisms have the
potential for explosive population growth.
Obs 2: However populations are relatively stable.
Deduction 1: There must be a struggle for existence.
Obs 3: Nature is full of variation.
Deduction 2: Some variation must be favored and other disfavored.
Genotype - ANSWER The combinations of DNA that code for proteins in an organism.
Phenotype - ANSWER Observable/measurable traits
Allele - ANSWER Alternate versions of a gene
Inter-Sexual Selection - ANSWER Certain traits evolve because they make an individual
, more attractive to the opposite sex.
Intra-Sexual Selection - ANSWER Certain traits evolve because they make an individual
more competitive against same sex rivals.
Teleology - ANSWER The idea that there is some end goal to evolution (this theory is
wrong).
Microevolution - ANSWER Changes in allele frequency within a species.
Macroevolution - ANSWER The creation of new species.
Adaptation - ANSWER A trait that increases the reproductive success of an organism and
is produced by natural selection.
2 Pieces of Evidence for Adaptations - ANSWER 1: Different forms of a trait appear in
similar species who live in different environments.
2: Similar forms of a trait appear in different species who live in similar environments
(convergent evolution)
Directional vs Stabilizing Selection - ANSWER Directional: a trait is selected for or against
to increase or decrease its frequency.
Stabilizing: variations of a trait are selected against so the frequency of the trait remains
stable.
ACCURATE ANSWERS
Lamarck's Theory - ANSWER Variation is acquired and then passed on (wrong but
scientific, ie falsifiable)
Malthus - ANSWER Population growth theory
Darwin's 3 Observations and 2 Deductions - ANSWER Obs 1: All organisms have the
potential for explosive population growth.
Obs 2: However populations are relatively stable.
Deduction 1: There must be a struggle for existence.
Obs 3: Nature is full of variation.
Deduction 2: Some variation must be favored and other disfavored.
Genotype - ANSWER The combinations of DNA that code for proteins in an organism.
Phenotype - ANSWER Observable/measurable traits
Allele - ANSWER Alternate versions of a gene
Inter-Sexual Selection - ANSWER Certain traits evolve because they make an individual
, more attractive to the opposite sex.
Intra-Sexual Selection - ANSWER Certain traits evolve because they make an individual
more competitive against same sex rivals.
Teleology - ANSWER The idea that there is some end goal to evolution (this theory is
wrong).
Microevolution - ANSWER Changes in allele frequency within a species.
Macroevolution - ANSWER The creation of new species.
Adaptation - ANSWER A trait that increases the reproductive success of an organism and
is produced by natural selection.
2 Pieces of Evidence for Adaptations - ANSWER 1: Different forms of a trait appear in
similar species who live in different environments.
2: Similar forms of a trait appear in different species who live in similar environments
(convergent evolution)
Directional vs Stabilizing Selection - ANSWER Directional: a trait is selected for or against
to increase or decrease its frequency.
Stabilizing: variations of a trait are selected against so the frequency of the trait remains
stable.
