Podcast
Questions and Answers
What is the typical gestation period for female hares?
What is the typical gestation period for female hares?
How many hares can a female give birth to each year?
How many hares can a female give birth to each year?
Which species of hare is known for its ability to camouflage in snowy environments?
Which species of hare is known for its ability to camouflage in snowy environments?
What does the survival of a wild hare typically depend on?
What does the survival of a wild hare typically depend on?
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What type of variations do young hares exhibit?
What type of variations do young hares exhibit?
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What phenomenon is demonstrated by the heavier average weight of turtles on an isolated island compared to those on the mainland?
What phenomenon is demonstrated by the heavier average weight of turtles on an isolated island compared to those on the mainland?
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Which of these factors limits the lifespan of wild hares?
Which of these factors limits the lifespan of wild hares?
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Which scientist is recognized for exploring evolutionary theories primarily in Europe and reaching conclusions similar to Darwin's?
Which scientist is recognized for exploring evolutionary theories primarily in Europe and reaching conclusions similar to Darwin's?
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How soon can a female hare mate after giving birth?
How soon can a female hare mate after giving birth?
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Which of the following best describes a structure that has lost most or all of its original function during the course of evolution?
Which of the following best describes a structure that has lost most or all of its original function during the course of evolution?
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How does natural selection occur in a population of hares?
How does natural selection occur in a population of hares?
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Which concept refers to a change in the genetic composition of a population due to random chance events?
Which concept refers to a change in the genetic composition of a population due to random chance events?
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In the Hardy-Weinberg principle, which condition is violated by the presence of migration in or out of a population?
In the Hardy-Weinberg principle, which condition is violated by the presence of migration in or out of a population?
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What percentage of the mice population carries the gene for white coloring?
What percentage of the mice population carries the gene for white coloring?
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How do you calculate the percentage of homozygous dominant individuals in the mice population?
How do you calculate the percentage of homozygous dominant individuals in the mice population?
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What is the significance of the trait 'Amniotic Egg' in the cladogram?
What is the significance of the trait 'Amniotic Egg' in the cladogram?
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What percentage represents the heterozygous individuals in the mice population?
What percentage represents the heterozygous individuals in the mice population?
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Which trait is NOT shared between all vertebrates according to the cladogram?
Which trait is NOT shared between all vertebrates according to the cladogram?
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In the cladogram, which organism is most closely related to primates?
In the cladogram, which organism is most closely related to primates?
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Which trait distinguishes amphibians from fish in the cladogram?
Which trait distinguishes amphibians from fish in the cladogram?
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What evolutionary implication can be drawn from the presence of feathers in birds?
What evolutionary implication can be drawn from the presence of feathers in birds?
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What does the phenomenon of overproduction in hare populations indicate?
What does the phenomenon of overproduction in hare populations indicate?
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What is meant by the 'struggle for existence' in the context of hare populations?
What is meant by the 'struggle for existence' in the context of hare populations?
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How does the snowshoe hare's camouflage benefit its survival?
How does the snowshoe hare's camouflage benefit its survival?
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Which line of evidence provides information about how ecosystems favored certain traits in past organisms?
Which line of evidence provides information about how ecosystems favored certain traits in past organisms?
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What does molecular sequencing help us understand regarding evolutionary relationships?
What does molecular sequencing help us understand regarding evolutionary relationships?
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What trait would NOT be present in the most recent common ancestor of amphibians and birds?
What trait would NOT be present in the most recent common ancestor of amphibians and birds?
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What type of selection is illustrated by the constant average antler size in the elk herd?
What type of selection is illustrated by the constant average antler size in the elk herd?
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What does biogeography study reveal about organisms?
What does biogeography study reveal about organisms?
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What is the main factor that drives the evolution of thick shells in molluscs?
What is the main factor that drives the evolution of thick shells in molluscs?
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Which of the following is NOT a challenge faced by wild hares?
Which of the following is NOT a challenge faced by wild hares?
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What mechanism of evolution is reflected by the inability of the western and eastern spotted skunks to mate due to their differing mating seasons?
What mechanism of evolution is reflected by the inability of the western and eastern spotted skunks to mate due to their differing mating seasons?
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What role does overproduction play in natural selection?
What role does overproduction play in natural selection?
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What is the consequence of the northern elephant seal population being reduced to only 20 individuals?
What is the consequence of the northern elephant seal population being reduced to only 20 individuals?
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In which mechanism do the blue-footed booby's unique courtship displays play a crucial role?
In which mechanism do the blue-footed booby's unique courtship displays play a crucial role?
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What type of selection is represented by medium-sized Madagascar hissing cockroaches being preyed upon more heavily than small or large ones?
What type of selection is represented by medium-sized Madagascar hissing cockroaches being preyed upon more heavily than small or large ones?
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What genetic mechanism is demonstrated when a small group of sea turtles establishes a new population on an isolated island?
What genetic mechanism is demonstrated when a small group of sea turtles establishes a new population on an isolated island?
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Study Notes
Part C Written Questions
- Hares are common prairie animals, pregnant for 30 days before giving birth to up to 12 young.
- Females care for the young for 30 days before mating again, potentially producing around 40 offspring yearly.
- Young hares show variations in fur length, colour, and ear size.
- Survival is challenging due to food scarcity, suitable burrow locations, and predator avoidance.
- Two major hare species exist in Saskatchewan: the snowshoe hare (camouflaged against snow) and the jackrabbit (larger).
Natural Selection
- Natural selection is the process where variations in organisms in a population are passed down, leading to adaptations.
- Darwin's five required elements of natural selection are:
- Variation in traits within a population.
- Inherited traits (passed on to offspring).
- More offspring are produced than can survive.
- Differential survival and reproduction based on these inherited traits.
- Gradual change in the population over time.
- Evidence from the hare scenario:
- Variations in fur colour and length, ear size, etc. allow individuals to better fit their environment (camouflage to snowy environment).
- Offspring are produced rapidly, allowing for a greater chance of survival of offspring with favourable traits.
- This leads to a continued increase of favourable traits of offspring over time.
Evolution Evidence
- Three lines of evidence showing evolution:
- Fossils: Help trace the evolutionary history of an organism’s ancestors, by showing how organisms have changed over time. The fossils show which organisms may have lived in similar environments and evolved similar traits.
- Molecular sequencing: Similar DNA sequences can reveal relatedness between organisms. It can also illustrate how the genetic material of an organism has changed over time.
- Comparative anatomy/embryology: Similarities in body structures (anatomical structures) or early developmental stages between organisms show possible ancestry and common descent. For example, if organisms have very similar structural body parts or similar early embryo development, it suggests the organisms may have a common ancestor.
Part C Problems
- A significant proportion of a randomly-mating mouse population show white colouring (inherited as recessive).
- The percentage of mice that do not carry the gene for white colouring is 17%.
- The percentage of heterozygous mice is 48.38%.
Evolutionary Relationships
- A cladogram was constructed showing evolutionary relationships among organisms.
- The cladogram displays features that show the relationships.
Common Ancestor
- Derived traits of a common ancestor between amphibians and birds include vertebrate, bony skeleton, and four limbs.
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Description
Explore the fascinating world of hares and the principles of natural selection. This quiz delves into the life cycle of prairie hares, their breeding patterns, and the impact of environmental factors on their survival. Additionally, learn about Darwin's foundational elements guiding natural selection.
