Analogous Structures in Biology
Explore analogous structures, their role in convergent evolution, and how they differ from homologous structures in this Grade 9 science worksheet.
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Analogous Structures Worksheet
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Read each question carefully and provide your best answer. This worksheet will test your understanding of analogous structures and convergent evolution.
1. Which of the following best defines analogous structures?
Structures with similar origin but different functions.
Structures with different origins but similar functions due to similar environmental pressures.
Structures that have lost their original function over time.
Structures found in embryos but not in adults.
2. The wings of a bat and the wings of an insect are considered analogous structures because:
They share a common evolutionary ancestor with wings.
They have similar bone structures.
They evolved independently to serve the same function (flight).
They are both vestigial structures.
1. Analogous structures are evidence of divergent evolution.
True
False
2. The streamlined body shapes of a dolphin and a shark are an example of analogous structures.
True
False
1. Analogous structures are a result of evolution, where unrelated species evolve similar traits.
2. The primary difference between analogous and homologous structures lies in their origin.
1. Explain why the term 'analogous' is used to describe structures that have similar functions but different evolutionary origins. Provide an example.
Match each example with the type of structure it represents.
1. Wing of a bird and wing of a butterfly
a. Homologous Structure
2. Forelimb of a human and forelimb of a cat
b. Analogous Structure