Biology Homework Chapter 19: Eukaryotes - Fish, Amphibians, Reptiles
Textbook assignment: Chapter 19: Vertebrates, sections 1-8.
- 19.1 Vertebrates have skulls and backbones; some have jaws, and land-based forms have four legs (tetrapods) and reproduce using amniotic eggs.
- 19.2 Lampreys lack hinged jaws; they occur frequently and early in fossil records, and so are considered an early vertebrate form by evolutionists.
- 19.3 Jawed vertebrates with gills and paired fins include sharks (cartilaginous or boneless fish), ray-finned fishes, and lobe-fin fishes.
- 19.4 One of the key characteristics of a successful theory is its ability to predict phenomena. The search for lobe-finned ancestors to terrestrial tetrapods led some biologists to examine a specific type of strata thought to have formed in the Devonian period in search of a transitional form....which they found.
- 19.5 Amphibians: juvenile forms are aquatic; adult forms may be aquatic or terrestrial; organ systems change between juvenile/adult forms (frogs, salamanders)
- 19.6 Reptiles: Reproduce using amniotic eggs, ectothermic, include crocodiles, lizards, snakes, turtles, alligators; may include birds depending on cladistic classification.
- 19.7 Birds: Can be considered terrestrial reptiles with feathers, since they are similar in body form and reproductive methods to reptiles.
- 19.8 Mammals: Primarily terrestrial; endothermic, with hair and mammary glands.
Read the following weblecture before chat: The Evolution of Animal Diversity, focussing on vertebrates other than mammals and primates.
Take notes on any questions you have, and be prepared to discuss the lecture in chat.
Perform the study activity below:
Recognizing differences between species can involve very subtle distinctions.
- Learn about The Origin of Species: The Beak of the Finch at the HHMI BioInteractive Site and test your understanding with this Interactive Film and Quiz.
Chat Preparation Activities
- Essay question: The Moodle forum for the session will assign a specific study question for you to prepare for chat. You need to read this question and post your answer before chat starts for this session.
- Mastery Exercise: The Moodle Mastery exercise for the chapter will contain sections related to our chat topic. Try to complete these before the chat starts, so that you can ask questions.
- No quiz yet: the Chapter Quiz opens when we finish the chapter.
Read through the lab for this week; bring questions to chat on any aspect of the lab, whether you intend not perform it or not. If you decide to perform the lab, be sure to submit your report by the posted due date.
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