BIO3334 Invertebrate Zoology Midterm Exam February 14, Name: Student number:
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1 30 pts. 1) Briefly, using one or two sentences, describe what each of the following biological terms means. Use an example where possible. Colloblast cell Spirocyst Water expulsion vesicles Coeloblastula larva Alveolate protozoans BIO 3334 Midterm Exam Feb 14, 2013 Page 1 of 8
2 Sporozoite Apomorphies Corona (not the beer) Uterine bell Seminal receptacle BIO 3334 Midterm Exam Feb 14, 2013 Page 2 of 8
3 10 pts 2. This is a compulsory question: Draw a cladogram for either Porifera, or the Gnathifera and identify and explain the symplesiomorphies, apomorphies and autoapomorphies for the classes in Porifera or the phyla in Gnathifera. 23 pts 3) Fill in the missing word, or provide the one or two word answer in the space provided at the end of the sentence. 3.1 In Turbellaria, the mouth is located on this side of the animal. 3.2 A hydrozoan pneumatophore is filled with. 3.3 Colonial hydrozoans resemble plants, and the "roots" that connect the different parts of the colony are called this. 3.4 How many anterior branches are there in a polyclad flatworm's gut? 3.5 Sponges are becoming of interest because not only do they protect themselves with spicules but also produce these to defend themselves. BIO 3334 Midterm Exam Feb 14, 2013 Page 3 of 8
4 3.6 These sacs help an acanthocephalan extend its proboscis. 3.7 You'll find an adult acanthocephalan living inside this part of a vertebrate. 3.8 When a rotifer's outer cuticle is solid and covering the trunk, it's called this. 3.9 The larval stage of an acanthocephalan ingested by the vertebrate host Food always enters a ciliate at the same point on its surface, that location is referred to as this Fused cilia form these, the principle locomotary structure of the Ctenophora Multiple fission after fusion of gametes The side of a gastrotrich where you'll find the cuticular plates Larval acanthocephala are parasites of animals in this phylum Unique feeding structure of a rotifer found at the base of the pharynx With its multiple copies of the genome, this describes the macronucleus in a ciliate These sacs in an acanthocephalan may be homologous to the digestive tract of other animals The only mineral used in deep see rhizaria to form their tests These create biradial symmetry in a Ctenophoran This stage of the malarial parasite is found feeding in the red blood cells The broad, fleshy pseudopods that we usually associate with amoebozoans are of this type The oral opening is located at the tip of this tubular extension in a scyphozoan medusa Name of the larva in the sexual cycle of a cycliophoran. BIO 3334 Midterm Exam Feb 14, 2013 Page 4 of 8
5 24 pts. 4) There are 7 questions in the following section. You only have to do 3 of them so be sure to read through them carefully before you start answering them. Each is worth 8 points. There is a BONUS. Pick a fourth question to answer and we ll make that your bonus. (It can t be the second half of a question you ve already answered.) All answers should be given in the space provided on the exam and be careful there are choices in the questions. 4.1 To which phylum do the Monogenea belong and how do they differ from other members of the phylum. The structure of the turbellarian gut varies within the class. What are these different organizations and arrange them in order from primitive to advanced. Justify the order you have placed them in. BIO 3334 Midterm Exam Feb 14, 2013 Page 5 of 8
6 4.2 How do pognophorans obtain essential nutrients and how are they modified to accommodate this from of feeding? How does a placozoan feed? 4.3 The terms symplesiomorphy and synapomorphy can often refer to the same character or trait. Use the phylogeny of the Cnidaria to explain why this is. (NOTE: This question is NOT asking for the phylogeny of the Cnidaria!) Today, how are protostomes differentiated from deuterostomes? How has the distinction changed over the last 20 years? BIO 3334 Midterm Exam Feb 14, 2013 Page 6 of 8
7 4.5 The aquiferous system is an autoapomorphy of the Porifera, what is it and how does it vary in the phylum? What types of cells would you find in the mesohyl of a sponge, what is mesohyl and what does each of the cells in it do? 4.6 How does a ctenophoran maintain its proper position in the three dimensional world of the ocean? The taxanomic position of the Gnathostomulids in the phylogeny of Animals has often changed. What are the changes and what are the characters that cause the confusion? BIO 3334 Midterm Exam Feb 14, 2013 Page 7 of 8
8 4.7 How has a better understanding of the centriole and cytoskeleton changed our understanding of the phylogeny of the protists? Anything written below this will not be markesd BIO 3334 Midterm Exam Feb 14, 2013 Page 8 of 8
BIO3334 Invertebrate Zoology Midterm Exam February 24, Name: Student number:
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