BSC 170 Exam 3 UPDATED Exam
Questions and CORRECT Answers
Who proposed evolution through natural selection as a mechanism - CORRECT
ANSWER - - Charles Darwin in his book "The Origin of Species"
- Life has adapted to be successful in many conditions
- Evolutions through natural selection is the central idea of understanding biology= explains
diversity of humans
The role of random mutations and non-random selection in evolution - CORRECT
ANSWER - - evolution via natural selection is not a random process
- new alleles arise through random mutation
- mutation causes new allele/traits= random or semi random
- selection is not random
-environment determines if a trait is successful
Evolution results from changes in allele frequency in a population - CORRECT
ANSWER - - evolution= change in allele frequency in a population over time
- if allele freqiency has changed then evolution has happened
-if you want to change the allele frequency= change the environment
-biological success=DNA living on/having offspring
- some organisms will be better to compete for food, shelter, mates, and iron
-traits making those organisms more competitive are passed on via heredity (genetics)
-offspring of the more competitive organisms are more likely to express these traits= present in
greater abundance in subsequent generations
What do scientist mean by theory? - CORRECT ANSWER - theory is a well tested,
comprehensive explanation of how something works and is well supported
ex: gravity is a theory
, Misconceptions about evolution: Transitional Fossils - CORRECT ANSWER - -argument:
no transitional fossils to fill in the gaps
-but there is evidence!
-evolution of whales (used to be dog like animal)
- little changes that resulted in whales
- are transitional fossils logical
Misconceptions about evolution: Humans evolving from apes - CORRECT ANSWER --
chimps and humans evolved from a common ancestor
-almost identical at DNA level
Misconceptions about evolution: Second Law of thermodynamics - CORRECT
ANSWER - -2nd law of thermodynamics says that you cannot increase complexity in a
system that is closed (going from a single cell to something more complex)
-entropy= opposite of order
-Earth is not a closed system! energy from the sun overcomes entropy= sun brings in energy
which means it is not a closed system
Misconceptions about evolution: Irreducible complexity - CORRECT ANSWER - Idea
that biological structures are so complex that removal of one component would render them
useless= therefore they could not have evolved gradually
-based on incomplete understand of biological history and components of structure
-evolution of eye= gradual increase in complexity along with increase in vision= significant
advantages in middle of no vision and human eye
Hardy-Weinberg equation - CORRECT ANSWER - p^2 + 2pq + q^2 = 1 (Genotypic
frequencies)
p + q = 1 (allele frequencies)
Why GMO is an inaccurate term - CORRECT ANSWER - -Genetically Modified
Organisms
Questions and CORRECT Answers
Who proposed evolution through natural selection as a mechanism - CORRECT
ANSWER - - Charles Darwin in his book "The Origin of Species"
- Life has adapted to be successful in many conditions
- Evolutions through natural selection is the central idea of understanding biology= explains
diversity of humans
The role of random mutations and non-random selection in evolution - CORRECT
ANSWER - - evolution via natural selection is not a random process
- new alleles arise through random mutation
- mutation causes new allele/traits= random or semi random
- selection is not random
-environment determines if a trait is successful
Evolution results from changes in allele frequency in a population - CORRECT
ANSWER - - evolution= change in allele frequency in a population over time
- if allele freqiency has changed then evolution has happened
-if you want to change the allele frequency= change the environment
-biological success=DNA living on/having offspring
- some organisms will be better to compete for food, shelter, mates, and iron
-traits making those organisms more competitive are passed on via heredity (genetics)
-offspring of the more competitive organisms are more likely to express these traits= present in
greater abundance in subsequent generations
What do scientist mean by theory? - CORRECT ANSWER - theory is a well tested,
comprehensive explanation of how something works and is well supported
ex: gravity is a theory
, Misconceptions about evolution: Transitional Fossils - CORRECT ANSWER - -argument:
no transitional fossils to fill in the gaps
-but there is evidence!
-evolution of whales (used to be dog like animal)
- little changes that resulted in whales
- are transitional fossils logical
Misconceptions about evolution: Humans evolving from apes - CORRECT ANSWER --
chimps and humans evolved from a common ancestor
-almost identical at DNA level
Misconceptions about evolution: Second Law of thermodynamics - CORRECT
ANSWER - -2nd law of thermodynamics says that you cannot increase complexity in a
system that is closed (going from a single cell to something more complex)
-entropy= opposite of order
-Earth is not a closed system! energy from the sun overcomes entropy= sun brings in energy
which means it is not a closed system
Misconceptions about evolution: Irreducible complexity - CORRECT ANSWER - Idea
that biological structures are so complex that removal of one component would render them
useless= therefore they could not have evolved gradually
-based on incomplete understand of biological history and components of structure
-evolution of eye= gradual increase in complexity along with increase in vision= significant
advantages in middle of no vision and human eye
Hardy-Weinberg equation - CORRECT ANSWER - p^2 + 2pq + q^2 = 1 (Genotypic
frequencies)
p + q = 1 (allele frequencies)
Why GMO is an inaccurate term - CORRECT ANSWER - -Genetically Modified
Organisms
