Download Unit 3 - Practice Test 1

Grade 11 University Biology – Unit 3 Evolution
Practice Test
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1.
A moth gene pool of peppered moths initially had a high relative frequency of light coloured alleles and a low
relative frequency of dark coloured alleles. After the industrial revolution, the moth gene pool consisted of
almost entirely of dark colours alleles because the light coloured moths were easier for predatory birds to
locate. The dark coloured moths became camouflaged with the pollution caused by factories. The dark
coloured allele frequency increased because the dark colour adaptation increased the moth`s
________________.
a. Awareness of predators
b. Fitness
c. Reproductive isolation
d. Sexual selection
e. Uniformitarianism
f. Monoculture
2.
In the Galapagos Islands, a species of tortoises evolved over time into two species, each on different
islands. What is the likely cause of this evolutionary change
a. The geographic isolation of the two groups of tortoises
b. A decrease in genetic variation in the initial population
c. Higher genetic variations of tortoises on one island
d. The social behaviour of the two groups of tortoises
3.
What is adaptation?
a. Inherited characteristic that increases chances of survival
b. Organisms with traits well suited to their environment survive and reproduce at a greater rate that
less well-adapted organisms in the same environment
c. A growing population causes a scarcity of resources
d. Changes in the DNA sequence
e. Ability to survive and reproduce in a specific environment
4.
Which statement describing a cause of extinction includes the other three?
a. Members of the extinct species were unable to conceal their presence by camouflage
b. Members of the extinct species were too slow to escape from predators
c. Members of the extinct species lacked adaptations essential for survival.
d. Members of the extinct species were unable to compete for food.
5.
Darwin's theory of evolution is based on...
a. Transmission of acquired characteristics
b. Spontaneous genetic mutations
c. Variation and natural selection
d. Use and disuse
6.
Similarity in the skeletal structures of whales, bats, and humans leads to the conclusion that they…
a. have the same chromosome number
b. belong to the same order of mammals
c. originated in the same environment
d. descended from a common ancestor
7.
When penicillin was first introduced, it was very effective in destroying most of the bacteria that cause
gonorrhea. Today, certain varieties of this bacterium are resistant to penicillin. Which statement best
explains the appearance of these resistant varieties?
a. Penicillin killed the susceptible bacteria, while naturally resistant varieties survived and reproduced.
b. Penicillin stimulated the production of antigens in the resistant bacteria.
c. Penicillin used today is not as strong as the penicillin used when it was first introduced.
d. Penicillin stimulated the bacteria to become resistant, and this resistance was passed to the
offspring.
8.
Which is not a principle of Darwin’s theory about the origin of species?
a. Individuals show variations.
b. Variations can be inherited.
c. Organisms have more offspring than available resources will support.
d. Offspring always inherit the best traits.
9.
What is the relationship between the terms natural selection and evolution?
a. They mean the same thing.
b. Evolution works against natural selection.
c. Evolution explains how natural selection works
d. Natural selection explains how evolution works
10. The development of the evolutionary theory has led to the understanding that the raw material for evolution
is _________.
a. Genes
b. Traits
c. Adaptation
d. Competition
11. Predators learn to avoid monarch butterflies because they contain a poison that is distasteful and can cause
the predator to get sick. The viceroy butterfly finds protection by closely resembling the monarch. What is
this adaptation in the viceroy called?
a. Camouflage
b. Fitness
c. Mimicry
d. Resemblance
State one possible reason that the light-coloured variety of moths was not completely eliminated from the polluted
environment.
What is EXTINCTION?
What is ARTIFICIAL SELECTION?
What is SURVIVAL OF THE FITTEST?
A sample of igneous rock is found to contain the radioactive parent and daughter isotopes uranium 235U and lead
207Pb in a ratio of 12.5% : 87.5%. Assuming that no 207Pb was present when the rock formed, estimate the age of the
sample? Recall 235U half-life is 713 million years. Show your calculations.
Bob believes that giraffes have long necks because they have stretched their necks to try and reach food that is high
in trees. Since the parent had stretched its neck, it passed the long neck on to its offspring. Ryan believes that
giraffes have long necks because the ones with long necks were able to reach the food, and those with short necks
could not and died. The long necked giraffes reproduced, and soon all of the giraffes had long necks.
a. Who thinks like Lamarck? Explain your choice
b. Who thinks like Darwin? Explain your choice
ANSWERS
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A sample of igneous rock is found to contain the radioactive parent and daughter isotopes uranium 235U
and lead 207Pb in a ratio of 12.5% : 87.5%. Assuming that no 207Pb was present when the rock formed,
estimate the age of the sample? Recall 235U half-life is 713 million years. Show your calculations.
2.14 billion years old Three half-lives. 3 X 713 million = 2.14 billion