Comparative Embryology Worksheet
Explore the similarities and differences in the embryonic development of various vertebrates, understanding how these comparisons provide evidence for evolution.
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Comparative Embryology
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Read each question carefully and provide your best answer. Some questions may require critical thinking and analysis of the provided image.
1. What is comparative embryology, and how does it contribute to our understanding of evolution?
Observe the image below, which illustrates the early embryonic stages of different vertebrates.
2. Based on the provided image, which of the following is a key similarity observed among early vertebrate embryos?
Presence of fully developed limbs
Absence of a tail
Presence of gill slits
Distinct adult features
3. The early developmental stage of an animal, characterized by rapid cell division, is called a .
4. The presence of homologous structures in early embryos, such as and a post-anal tail, suggests a common ancestry.
5. The more similar the embryonic development of two species, the more closely related they are considered to be.
True
False
6. While early vertebrate embryos show striking similarities, they eventually diverge to develop species-specific characteristics. Explain why these differences are important in the context of evolution.
Use the words below to complete the sentences.
7. The development of an individual organism from fertilized egg to adult is known as .
8. Structures that are similar in origin but may have different functions are called structures.