KimseyRoseheimFinalW06key - BIS 1B Final. Rosenheim and...

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1 BIS 1B Final. Rosenheim and Kimsey ANSWER KEY Winter 2006 Questions 1-18 : Multiple choice questions (5 points each; total 90 points) 1. An important trait that justifies splitting sponges off the lineage of animals at the base of the metazoan cladogram is that they a. lack any form of totipotent cells b. have a form of replacement bone in their mesoglea c. lack any form of symmetry d. never reproduce sexually e. possess one or more forms of collagen Answer: c 2. The trochophore larva a. is retained as an embryonic form in amphibians and fishes b. is found only in marine cephalopods and some sponges c. may also develop into the planula stage of Cnidaria d. hatches from the egg of some marine molluscs and some annelids e. all of the above are true Answer: d 3. Paedomorphosis, Neoteny and Progenesis a. are powerful mechanisms for generating new morphologies b. appear repeatedly in vertebrates, especially in amphibians c. are processes that may have given rise to the larva like ancestor of all Vertebrata d. may allow a successful larval characteristic to be exploited by adults e. All the above are true Answer: e 4. Within the Urochordata there are a variety of different groups including a. those which are solitary, colonial or both b. sessile forms attached to hard substrates and lemon-shaped colonial pelagic forms c. pelagic forms that are often transparent, gelatinous, and nearly invisible in water d. larva-like pelagic forms that build a house of mucus interlaced with filters e. all of these are urochordate conditions Answer: e 5. The most diverse group of fishes in existence today is quite clearly the ray finned fishes that live on continental shelf ecosystems. They seem to have achieved this radiation in a. coastal marine waters due to available sunlight energy, compared to the complete darkness of the abyssal open ocean and the instability of freshwater ecosystems b. freshwater ecosystems, because the water is more pure and does not contain the salts found in seawater c. coastal marine ecosystems, open ocean as well as freshwater, because fishes have adapted to all these environments and salinities d. freshwater ecosystems, because they are subject to division, spatial separation and isolation from one another, thereby creating allopatric and potentially speciating fish populations e. open ocean, because of the great amount of space and continuous nature of the oceanic environment
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2 Answer: d 6. The female provides nutrition and gas exchange for developing young via a unique uterine connection in a. the order Monotremata except in the duck billed platypus b. eutherian and certain shark reproductive systems c. all those mammals that have hair and nurse their young d. the order Marsupialia and in Amphibians e. opossums, bats, whales, polar bear, shrews, and humans Answer: b 7. Life history traits that characterize amphibians may include a. modification of the water-proof skin to increase water permeability b.
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This note was uploaded on 04/15/2008 for the course BIS 1b taught by Professor Kimsey during the Spring '08 term at UC Davis.

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KimseyRoseheimFinalW06key - BIS 1B Final. Rosenheim and...

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