BIO 124 Test 1 UPDATED Exam Questions
and CORRECT Answers
Which of the following statements would Darwin have disagreed with? - CORRECT
ANSWER - Descent with modification occurs through inheritance of acquired
characteristics
What evidence is used to determine the branching sequence of an evolutionary tree? -
CORRECT ANSWER - anatomical or molecular homologous structures
Which of the following bets expresses the concept of natural selection? - CORRECT
ANSWER - reproductive success influenced by inheritance traits
The ultimate source of new alleles - CORRECT ANSWER - mutation
Which of the following will tend to produce adaptive changes in population? - CORRECT
ANSWER - natural selection
Microevolution, or evolution at its smallest scale, occurs when - CORRECT ANSWER -a
population's allele frequencies change over a span of generations
The recessive allele os a gene causes cystic fibrosis. For the gene among Caucasian, p=0.98. If
the Caucasian population is in Hardy Weinberg equilibrium with the respect of this gene, what
proportion of babies is born homozygous recessive and therefore suffers cystic fibrosis? -
CORRECT ANSWER - (0.02)^2 = 0.0004
After a copper smaller begins operation, local downwind population of plants begin to adapt to
the resulting air pollution. Scientists document, for example, that the acid tolerance of several
plant species has increased significantly in the polluted area. This is an example of - CORRECT
ANSWER - directional selection
, A dog breeder wishes to develop a breed that does not bark. She starts with a diverse mixture of
dogs. After 30 years of work, she has a new breed of dog with interesting traits, but on average
the dog still barks at the same rate as other dogs. Which of the following is a logical explanation
- CORRECT ANSWER - The selection was artificial, not natural, so it did not produce
evolutionary change
Which of the following conditions would tend to make the Hardy Weinberg equation more
accurate for predicting the genotype frequencies of future generations in a population of a
sexually reprodcuing species - CORRECT ANSWER - little gene flow with surrounding
populations
Which of the following would prevent an organism from becoming part of the fossil record when
it dies? - CORRECT ANSWER - it is fully decomposed by bacteria and fungi
The core theme of biology, which explains both the unity and diversity of life is? - CORRECT
ANSWER - evolution
The frequency of homozygous dominant individuals in a population that is in Hardy Weinberg
equilibrium is equal too - CORRECT ANSWER - p^2
Humans share several features with salamanders. Certain genes and proteins are nearly identical
between 2 species, both species have 4 limbs with a similar skeletal structure; the species early
embryos are similar; and where the salamander has a functional tail, humans have a vestigial tail
bone. in evolutionary terms, these are examples of? - CORRECT ANSWER - homology
During the 1950's, a scientist named Lysenko tried to solve the food shortages in the Soviet
Union by breeding wheat that could grow in Siberia. He theorized that is individual wheat plants
were exposed to cold, the would develop additional cold tolerance and pass it to their offspring.
Based on the ideas of artificial and natural selection, do you think this project worked as
planned? - CORRECT ANSWER - No, because there was no process of selection based on
inheritance traits. Lysenko assumed that exposure could induce a plant to develop additional cole
tolerance and this tolerance would be passed to the plant's off spring
and CORRECT Answers
Which of the following statements would Darwin have disagreed with? - CORRECT
ANSWER - Descent with modification occurs through inheritance of acquired
characteristics
What evidence is used to determine the branching sequence of an evolutionary tree? -
CORRECT ANSWER - anatomical or molecular homologous structures
Which of the following bets expresses the concept of natural selection? - CORRECT
ANSWER - reproductive success influenced by inheritance traits
The ultimate source of new alleles - CORRECT ANSWER - mutation
Which of the following will tend to produce adaptive changes in population? - CORRECT
ANSWER - natural selection
Microevolution, or evolution at its smallest scale, occurs when - CORRECT ANSWER -a
population's allele frequencies change over a span of generations
The recessive allele os a gene causes cystic fibrosis. For the gene among Caucasian, p=0.98. If
the Caucasian population is in Hardy Weinberg equilibrium with the respect of this gene, what
proportion of babies is born homozygous recessive and therefore suffers cystic fibrosis? -
CORRECT ANSWER - (0.02)^2 = 0.0004
After a copper smaller begins operation, local downwind population of plants begin to adapt to
the resulting air pollution. Scientists document, for example, that the acid tolerance of several
plant species has increased significantly in the polluted area. This is an example of - CORRECT
ANSWER - directional selection
, A dog breeder wishes to develop a breed that does not bark. She starts with a diverse mixture of
dogs. After 30 years of work, she has a new breed of dog with interesting traits, but on average
the dog still barks at the same rate as other dogs. Which of the following is a logical explanation
- CORRECT ANSWER - The selection was artificial, not natural, so it did not produce
evolutionary change
Which of the following conditions would tend to make the Hardy Weinberg equation more
accurate for predicting the genotype frequencies of future generations in a population of a
sexually reprodcuing species - CORRECT ANSWER - little gene flow with surrounding
populations
Which of the following would prevent an organism from becoming part of the fossil record when
it dies? - CORRECT ANSWER - it is fully decomposed by bacteria and fungi
The core theme of biology, which explains both the unity and diversity of life is? - CORRECT
ANSWER - evolution
The frequency of homozygous dominant individuals in a population that is in Hardy Weinberg
equilibrium is equal too - CORRECT ANSWER - p^2
Humans share several features with salamanders. Certain genes and proteins are nearly identical
between 2 species, both species have 4 limbs with a similar skeletal structure; the species early
embryos are similar; and where the salamander has a functional tail, humans have a vestigial tail
bone. in evolutionary terms, these are examples of? - CORRECT ANSWER - homology
During the 1950's, a scientist named Lysenko tried to solve the food shortages in the Soviet
Union by breeding wheat that could grow in Siberia. He theorized that is individual wheat plants
were exposed to cold, the would develop additional cold tolerance and pass it to their offspring.
Based on the ideas of artificial and natural selection, do you think this project worked as
planned? - CORRECT ANSWER - No, because there was no process of selection based on
inheritance traits. Lysenko assumed that exposure could induce a plant to develop additional cole
tolerance and this tolerance would be passed to the plant's off spring
