Asexual Reproduction Sexual Reproduction (P 145, fig. 7.10) (P146, Figs. 7.15-7.16) Station 12 – Phylum Cnidaria (Obelia) Obelia is a marine, colonial animal that illustrates the phenomenon of alteration of generations because it alternates between the asexual polyp form and the sexual medusa form. You will be held responsible for the Obelia life cycle. Examine prepared slides of Obelia hydroids and their medusa. Be able to identify the following structures and know their functions: hydranth, gonangium, and the basal disc in the polyp, and tentacles, manubrium, radial canals, gonads, and mouth in the medusa. Medusa (P 146, Figs. 7.18-7.19) (P 147, Figs. 7.20-7.21) Station 13 – Phylum: Ctenophora Be able to recognize the example. What does the word ctenophore mean? How do these organisms differ from the Cnidarians? Station 14 – Phylum: Platyhelminthes What characteristic is responsible for the branching off of the flatworms from earlier animals? What of organization do these organisms demonstrate? How many tissue layers do these organisms have?
Station 25 – Phylum: Nematoda Level of Organization Organ-system level Tissue Layers Triploblastic Type of Digestive System Alimentary canal What type of digestion do they have? Extra- and intracellular Type of Excretory System Waste exits the excretory pores Type of Circulatory System None Type of Respiratory System None Type of Nervous System Cerebral ganglia or ring with anterior and posterior nerves Type of Body Cavity Pseudocoelomates Why is it considered a “false cavity”? It is not lined with mesoderm Type of Asexual Reproduction None Type of Sexual Reproduction Complicated life cycles Station 26 – Phylum: Nematoda Cross-section of a nematode (P 164, Fig 7.102-7.103) – You will also be asked to examine the through a human intestinal worm. You need to be able to identify the following structures: cuticle, epidermis, pseudocoel, longitudinal muscle, dorsal and ventral nerve cords, and the intestines. Station 27 – Lophophorates What is a lophophore? What are the three phyla that are commonly called lophophorates? What two other similarities are seen between these three phyla? What type of coelom do these organisms have?
Papillae: Station 13 – Echinoderm Classes Be able to identify the characteristics that separate the echinoderm classes. Class Characteristics Examples Asteroidea Ophiuroidea Echinodea Holothuroidea Crinoidea Station 14 – Class: Asteroidea Be able to recognize the examples at this station. Is the ambulacral groove open or closed? Where is the madreporite located? Do they have pedicellariae? Do they have dermal branchiae?
are they found? How do they survive dessication? What do they eat? Station 1 – Bony fish Adaptations – Class Actinopterygii – Ray-finned Fish Fill out the following table - Be able to recognize the pictures and/or specimens of these organisms. Infraclass: Holosteri 1. What do all these fish have in common? Classification Fish Information Order: Lepisoteriformes Gar Where are these fish normally found? How are they able to breathe atmospheric air? Order: Amiiformes Amia What are the common names of this fish? How do these fish survive dry conditions? Where are these fish normally found? What do fish eat? Station 2 - Infraclass: Telostei
Order: Perciformes Garibaldi What do they represent for ? Where are they found? What type of marine habitat are they associated with? What do they eat? What ability do they have to “even out” the population? Superorder: Acanthopterygii (cont.) Classification Fish Information Perciformes (cont.) Striped Marlin Where are they found? How large are they? How much do they weigh? What are they built for? What do they eat and where? Wrasses / Sheephead Where are they found? Where are sheepheads found? What do sheepheads eat? How are feeding patches maintained? What if the male is removed?
Legless Lizard 1. are they found? 2. Why are they considered lizards not snakes? Long-nosed Leopard Lizard 1. Where are they found? 2. What type of habitat do they prefer? Station 34 – Class: Squamata (Snakes) Be able to recognize the examples at this station. What do organisms usually lack? What is the function of the Jacobsen’s organ? What is unique about the jaw structure of snakes? Why is this necessary? Station 35- Snake Adaptations-Feeding- be able to recognize the animal and be able to describe the adaptation that each one has. 1. What is the difference between a venomous animal and a poisonous animal? 2. Describe the difference in the venom of Southern Pacific and Mojave Rattlesnakes? 3. Describe the of Southern Pacific and Mojave Rattlesnakes? 4. What are loreal pits used for?
Station 36 - Snake Adaptations - Be able to recognize the animal and be able to describe the adaptation that each one has. Describe the of a Cobra? Describe the fangs of a Cobra? What is the largest venomous snake in the world? Where is it found? How strong is its venom? What is the most venomous snake in the world? How dangerous are sea snakes? How are they shaped for movement in the water? Station 37 – Snake Families Be able to recognize each family and its characteristics along with the examples. Family Description Example Boidae – Pythons and Boas Rock Python Anaconda Rosy Boa Colubridae – Colubrids Ring-necked Snake. 1. Where are they found? 2. What do they do when they come upon a predator?