Comparative Embryology Worksheet
Explore the principles of comparative embryology, analyze embryonic development across different species, and understand its significance in evolutionary biology for grade 11 science students.
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Comparative Embryology Worksheet
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Read each question carefully and provide thoughtful answers based on your understanding of comparative embryology.
1. Which of the following best describes the principle of comparative embryology?
The study of adult organisms to find common ancestors.
The comparison of embryonic development in different species to reveal evolutionary relationships.
The analysis of fossilized embryos to determine ancient life forms.
The examination of genetic mutations during embryonic growth.
2. Early embryos of vertebrates often show gill slits and a tail, even in species that do not possess these features as adults. What does this suggest?
All vertebrates are aquatic at some stage of development.
Vertebrates share a common ancestor.
Embryonic development is a random process.
These features are vestigial organs in adults.
1. The more similar the embryonic development of two species, the more closely related they are considered to be.
True
False
2. Comparative embryology supports the idea of divergent evolution, where different species evolve from a common ancestor.
True
False
1. The study of the development of an organism from zygote to birth is called .
2. In the early stages of development, many vertebrate embryos exhibit similar structures, such as and .
3. Ernst Haeckel's phrase "ontogeny recapitulates phylogeny" suggests that an organism's development (ontogeny) mirrors its history (phylogeny).
1. Observe the image below showing different stages of embryonic development.
Based on the image and your knowledge, explain how these embryonic similarities provide evidence for evolution.
2. Discuss at least two specific examples of embryonic structures that are common across diverse vertebrate species but may not be present in their adult forms.