Practice Questions
Examine the evolutionary link between dinosaurs and modern birds as suggested by paleontological evidence.
Examine why the flippers of a penguin and a dolphin are considered analogous structures rather than homologous.
Name the two key concepts of the Darwinian Theory of Evolution.
Justify why genetic drift, the change in allele frequencies due to chance, has a more significant evolutionary impact on small populations than on large ones.
Define the term 'panspermia' as it relates to the origin of life.
Identify the theory proposed by Hugo de Vries to explain the mechanism of evolution.
A population of peppered moths shows a steady decrease in the frequency of the recessive allele for light coloration in an industrial area. Formulate a hypothesis to explain this deviation from Hardy-Weinberg equilibrium.
List the five factors that are known to affect the Hardy-Weinberg equilibrium.
Compare and contrast homologous and analogous structures, providing one example for each from both plants and animals. How do these structures demonstrate divergent and convergent evolution respectively?
Apply Darwin's concept of natural selection to briefly explain the rapid emergence of antibiotic-resistant bacteria.
Apply the concept of adaptive radiation to explain the diversity of Darwin's finches on the Galapagos Islands.
Recall the approximate brain capacity of Homo erectus.
Explain the difference between homologous and analogous structures, providing one example for each.
State the Hardy-Weinberg equation and define each of the variables used in it.
Describe the theory of chemical evolution as proposed by Oparin and Haldane. What were the conditions on early Earth that they believed were necessary for this process?
Explain the concept of 'adaptive radiation' using the example of Australian marsupials.
Compare the theory of Spontaneous Generation with the Oparin-Haldane theory regarding the origin of the first life form.
Analyze the significance of S.L. Miller's 1953 experiment in the context of the origin of life. What did it demonstrate and what were its limitations?
Compare the key characteristics, including brain capacity and presumed diet, of Homo habilis and Homo erectus.
In a certain population that is in Hardy-Weinberg equilibrium, the frequency of the recessive allele (a) is 0.4. Calculate the percentage of the population that is expected to be heterozygous (Aa).
Contrast the concepts of 'saltation' as proposed by Hugo de Vries and 'gradualism' as envisioned by Darwin.
Critique Lamarck's theory of 'inheritance of acquired characters' using Darwin's theory of natural selection as a basis for your argument. Use the example of giraffes' long necks.
Critique the popular notion that 'human evolution has stopped.' Formulate arguments both for and against this proposition, citing modern-day selective pressures.
Propose a hypothetical scenario of adaptive radiation for a species of seed-eating finch that colonizes a newly formed, isolated volcanic archipelago with diverse unoccupied ecological niches.
Evaluate the statement: 'Analogous structures are a better indicator of adaptation to a specific environment than homologous structures.' Justify your position with examples.
Describe the experimental setup used by S.L. Miller in 1953. What was the main observation of this experiment?
State the Hardy-Weinberg principle.
Analyze how industrialization in England acted as a selective pressure, leading to a shift in the population of the peppered moth (Biston betularia).
Evaluate the evolutionary significance of the dietary shift from primarily fruit (frugivory) to including meat (carnivory/omnivory) in early hominids like Homo habilis and Homo erectus.
Justify why molecular data, such as DNA or amino acid sequences, are now considered a more objective and powerful tool for constructing phylogenetic relationships than traditional morphological evidence alone.
Propose a reason why Hugo de Vries's theory of saltation (speciation via a single large mutation) is not considered the primary mechanism of evolution, while Darwin's concept of gradual accumulation of small variations is more widely accepted.
Explain industrial melanism in moths as an example of evolution by natural selection.
Design a multi-faceted public health strategy to slow down the evolution of antibiotic-resistant bacteria. Justify each component of your strategy using principles of natural selection.
In a population of 1000 individuals, 360 have the genotype AA, 480 have Aa, and 160 have aa. Calculate the frequencies of allele A (p) and allele a (q). Demonstrate if this population is in Hardy-Weinberg equilibrium.
Compare the evolutionary mechanism proposed by Lamarck with Darwin's theory of natural selection, using the example of the giraffe's long neck. Analyze why Lamarck's theory is no longer accepted.
Analyze how genetic drift, specifically through the founder effect, can lead to the formation of a new species.
Analyze the statement from the text: 'The skull of a baby chimpanzee is more like an adult human skull than an adult chimpanzee skull.' What does this comparison suggest about the evolutionary development of humans?
In a population of 1000 pea plants, 360 have white flowers (recessive trait, genotype 'aa') and 640 have purple flowers. Assuming the purple-flowered plants consist of both homozygous dominant ('AA') and heterozygous ('Aa') individuals, evaluate if this population is in Hardy-Weinberg equilibrium. Justify your conclusion by calculating the expected genotype frequencies.
Critique the theory of spontaneous generation by evaluating the contributions of Louis Pasteur's experiment and the Miller-Urey experiment. Explain how these two experiments address different aspects of the origin of life.
Summarize the key observations and inferences that form the basis of Darwin's theory of natural selection.
Design a laboratory experiment to demonstrate the process of evolution by natural selection using a population of bacteria and an antibiotic like penicillin. State your hypothesis, procedure, expected results, and conclusion.
You discover three hypothetical flying creatures: Creature A has wings made of feathered skin stretched over elongated finger bones (like a bat). Creature B has wings made of stiff, non-bony membrane supported by external ribs (like an insect). Creature C has wings made of feathered skin stretched over its entire arm structure, including elongated finger bones (similar to A). Create a simple phylogenetic tree for these creatures and justify your classification by evaluating whether the wings are homologous or analogous structures.
Evaluate the 'RNA world' hypothesis as a plausible step in the origin of life. Justify your evaluation by discussing at least two strengths that support it and one major weakness or challenge it faces.
Define 'founder effect'.
Describe the major stages in the origin and evolution of man, starting from Dryopithecus to Homo sapiens. List at least three distinct hominids and one key feature for each.