10.4: Data Analysis and Discussion
- Page ID
- 178604
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Discussion should be typed (double spaced, size 12 font and standard 1” margins). There are no specific length requirements for this discussion but be sure to address all the components in the prompt below. You will submit this discussion along with your sketches and observations for your completed lab report.
Prompt/Questions to Address
Write a discussion for this experiment which explores the characteristics and evolutionary significance of the animals observed during this lab. Be sure to address each of the following in your discussion:
- Examine the body plan of fishes. What are the main structural adaptations of the perch that allow it to live successfully in an aquatic environment?
- Examine the body plan of amphibians. Frogs have both lungs and moist skin for respiration. How does this dual respiratory system benefit them?
- Examine the body plan of reptiles. Snakes show many adaptations for terrestrial life despite lacking limbs. What body structures help them move and hunt effectively?
- Evaluate the evolutionary relationships between these different animals. Compare the body symmetry, skeletal support, and mode of locomotion among the four vertebrates dissected (perch, frog, snake, and rat). How do these features reflect their adaptations to aquatic or terrestrial habitats? Discuss how the transition from aquatic to terrestrial life is reflected in the anatomy of the frog, snake, and rat. Which features provide evidence of this evolutionary progression?