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What mechanism did Charles Darwin propose as the driving force behind evolution?
Anonymous Quiz
0%
A. Mutation
17%
B. Genetic drift
72%
C. Natural selection
11%
D. Inheritance of acquired traits
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What does Neo-Darwinism primarily focus on?
Anonymous Quiz
0%
A. The study of punctuated equilibrium
23%
B. The role of genetic mutations in evolution
8%
C. The inheritance of acquired characteristics
69%
D. The integration of genetics with natural selection
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What is the significance of the postulate "variation exists within populations" in naturalselection?
Anonymous Quiz
0%
A. It eliminates competition among individuals.
30%
B. It ensures the survival of all individuals within a population.
20%
C. It prevents environmental changes from affecting populations.
50%
D. It allows for differential survival and reproduction based on heritable traits.
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Which of the following is NOT considered evidence for evolution?
Anonymous Quiz
0%
A. Fossil record
8%
B. Comparative anatomy
83%
C. Genetic drift
8%
D. Homologous structures
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How do homologous structures support the theory of evolution?
Anonymous Quiz
0%
A. By demonstrating that species remain unchanged over time
40%
B. By showing that unrelated species can develop similar traits
0%
C. By indicating that species adapt to their environments independently
60%
D. By revealing patterns of divergence and common ancestry among species
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What does the study of comparative embryology reveal about evolutionary relationships?
Anonymous Quiz
36%
A. Species with similar adult forms always have similar embryos
0%
B. Species with different adult forms always have different embryos
0%
C. Embryonic development is not influenced by evolutionary history
64%
D. Similarities in embryonic development often reflect common ancestry
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Which geological principle states that in an undisturbed sequence of sedimentary rock layers,the oldest rocks are at the bottom?
Anonymous Quiz
43%
A. Stratigraphy
43%
B. Superposition
14%
C. Original horizontality
0%
D. Cross-cutting relationships
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If a fossil contains 12.5% of its original carbon-14, approximately how many half-lives havepassed since the organism died?
Anonymous Quiz
9%
A. One
9%
B. Two
82%
C. Three
0%
D. Four
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If a fossil is found to have a carbon-14 to carbon-12 ratio that is 1/4 of that found in livingorganisms, and the half-life of carbon-14 is 5730 years, approximately how old is the fossil?
Anonymous Quiz
14%
A. 1432.5 years
0%
B. 5730 years
43%
C. 2865 years
43%
D. 11,460 years
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Which of the following types of natural selection involves the selection of individuals at oneextreme of a trait distribution?
Anonymous Quiz
15%
A. Stabilizing selection
31%
B. Disruptive selection
54%
C. Directional selection
0%
D. Balancing selection
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In stabilizing selection, what happens to the range of phenotypic variation in a population?
Anonymous Quiz
18%
A. It increases.
55%
B. It decreases.
18%
C. It becomes random.
9%
D. It remains unchanged.
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In which type of natural selection do extreme phenotypes have a selective advantage, leading tothe divergence of a population into two distinct phenotypic groups?
Anonymous Quiz
13%
A. Stabilizing selection
88%
B. Disruptive
0%
C. Directional selectionselection
0%
D. Balancing selection
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What is an example of sympatric speciation?
Anonymous Quiz
0%
A. The migration of polar bears to the Arctic region
25%
B. The adaptation of kangaroos to different habitats within Australia
25%
C. The separation of the Galapagos finches due to geographic barriers
50%
D. The development of new species of cichlid fish in the same African lake
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What role does polyploidy play in the evolution of plants?
Anonymous Quiz
0%
A. It inhibits the formation of new species
0%
B. It restricts the ability of plants to reproduce
89%
C. It enhances genetic diversity and promotes speciation
11%
D. It decreases the adaptability of plants to new environments
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Which of the following represents a prezygotic reproductive isolation mechanism?
Anonymous Quiz
0%
A. Hybrid inviability
92%
B. Mechanical isolation
8%
C. Hybrid breakdown
0%
D. Reduced hybrid fertility
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Which of the following statements about Homo habilis is true?
Anonymous Quiz
29%
A. It is considered the first species to use fire.
14%
B. It had a larger brain size compared to Homo sapiens.
29%
C. It was primarily quadrupedal, similar to chimpanzees.
29%
D. It is believed to be one of the earliest members of the genus Homo.
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When considering primate evolution, which species shares a more recent common ancestor with humans?
Anonymous Quiz
7%
A. Gorillas
86%
B. Chimpanzees
0%
C. Spider monkey
7%
D. Colobus monkeys
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Which percentage of the body's total energy expenditure does the human brain typically account for?
Anonymous Quiz
6%
A. 5%
13%
B. 10%
56%
C. 25%
25%
D. 50%