Questions and Answers
What is the difference between Darwin's theory of evolution and Lamarck's theory of evolution?
Lamarck believed that organisms could acquire characteristics during their lifetime that they could pass down to their offspring, but Darwin did not believe these traits could be passed down.
Why do scientists accept Darwin's theory of evolution instead of Lamarck's theory?
Scientists accept Darwin's theory of evolution because there is ample evidence to support it.
Under which of the following circumstances would natural selection not operate on an organism?
Which of the following observations helped Darwin develop his theory of natural selection?
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Which of the following explains why a tree is often used as a model to represent the principle of common descent?
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Study Notes
Darwin's vs. Lamarck's Theory of Evolution
- Lamarck proposed that organisms could acquire traits during their lifetime and pass them to offspring, a concept not supported by Darwin.
- Darwin's theory focuses on natural selection, emphasizing that traits cannot be acquired but are inherited from ancestral generations.
Acceptance of Darwin's Theory
- Darwin's theory is widely accepted in the scientific community due to substantial evidence backing it, including fossil records, genetic studies, and observations of natural selection in various species.
Conditions for Natural Selection
- Natural selection cannot occur in a population where there is no variation in fitness among individuals, meaning all individuals have an equal chance of survival and reproduction.
Observations Contributing to Natural Selection
- Notable observations by Darwin, such as variations in beak shape among finches on the Galápagos Islands, contributed significantly to the formulation of his theory, demonstrating adaptation to diverse ecological niches.
Common Descent Representation
- The concept of common descent is often visualized using a tree model, where branches emerge from a central trunk, illustrating how species are interconnected through evolutionary relationships.
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Description
Test your understanding of Darwin's theory of evolution and how it contrasts with Lamarck's ideas. This quiz covers key concepts and definitions essential for grasping the principles of natural selection and evolutionary biology.
