TEST 3 Notes bio1202

TEST 3 Notes bio1202 - < <...

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Unformatted text preview: < < adaptations to reduce weight < If you used a fungicide to destroy the mycorrhizae associated with the roots of a plant, what would most likely happen to the plant? IT WILL GROW WORSE BC IT WILL HAVE A REDUCED WATER AND MINERAL SUPPLY. When the 2 nuclei in the cell of a dikaryotic mycelium fuse within the fruiting body, what cell type is produced? HETEROKARYON How many planes through the central axis will divide an organism with radial symmetry into roughly equal halves? MANY In the life cycle of a typical hydrozoan (class hydrozoa), which of the following would most likely be free swimming? MEDUSA 3 of the 4 animals listed below possess some type of coelom. Select the exception. Annelids, arthropods, mollusks, platyhelminths Which of the following statements is not true? ALL CHORDATES HAVE VERTEBRAE Which of the following is a diagnostic feature of tunicates that forms the basis for its classification as a chordate? A NOTOCHORD LOCATED ALONG THE DORSAL PART OF THE LARVA The most primitive, but still existing craniates are members of the class MYXINI Sharks, skates, and rays belong to the class CHONDRICHTHYES GILL ARCHES were modified to form jaws If an amphibian could be a plant, which plant would it be? MOSS Why is the amniotic egg considered an important evolutionary breakthrough? IT ALLOWS I NCUBATION OF EGGS IN A TERRESTRIAL ENVIRONMENT Which is not a characteristic of all mammals? A four chambered heart, have hair at some period of their life, have glands to produce milk to nourish their young, give birth to live young (viviparous). Chapter 33: Invertebrates Concept 33.1: Sponges are basal animals that lack true tissues o Porifera: phyla calcarea and silicea Live in both fresh and marine waters Lack true tissues and organs Asymmetrical body o Sponges Sponges are suspension feeders Filter water passing through their bodies o Water movement through a sponge would follow what path? Pore> spongocoel> osculum Concept 33.2: Cnidarians are an ancient phylum of eumetazoans o Cnidarians A wide range of sessile and floating forms including jellyfish, corals, and hydras Simple diploblastic, radial body plan Body plan is a sac with a central gastrovascular cavity Single opening serves as both mouth and anus Mesoglea layer between epidermis and endodermis (gastrodermis) Cnidarians Polyp form is generally sessile Medusa form moves freely in water by passive drifting and contractions of the bell Defining feature of cnidarians Cnidocytes o Unique cells that function in defense and the capture of prey Stimulus causes the cell to evert releasing thread Some cnidocytes sting, others just entangle prey Concept 33.3: Lophotrochozoans, a clade identified by molecular data, have the widest range of animal body forms. o Flatworms Phylum platyhelminthes Triploblastic development, but acoelomate o Class turbellaria Have: Light-sensitivve eyespots Centralized nerve net with anterior ganglia...
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This note was uploaded on 03/31/2010 for the course BIOL 1202 taught by Professor Gregg during the Spring '08 term at LSU.

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TEST 3 Notes bio1202 - < <...

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