Hydrozoa - Study guides, Class notes & Summaries

1) What are the cells in a sponge that are primarily responsible for trapping food particles from circulating water? A) amoebocytes B) choanocytes C) mesohyl cells D) pore cells (porocytes) E) epidermal cells Answer: B 9) A radially symmetrical animal that has two embryonic tissue layers belongs to which phylum? A) Porifera B) Cnidaria C) Platyhelminthes D) Nematoda E) Echinodermata Answer: B 10) All of the following are characteristics of the phylum Cnidaria except A) a gastrovascular cavity. B...

NATIONAL OPEN UNIVERSITY OF NIGERIA COURSE CODE : BIO 207 COURSE TITLE: LOWER INVERTEBRATES Course Code & Course Title: BIO 207: Lower Invertebrates Course Writer: Dr. Patrick A. Audu Course Editor Programme Leader Dr. Ado Baba Ahmed National Open University of Nigeria, Lagos Course Coordinator Mr. Adams, Abiodun E National Open Univers...

it's all about Non-chordates

UBCO BIOL 205 Invertebrate Zoology Exam Questions and Answers Porifera Classes - ANSWER-Calcarea, Hexactinellida, Demospongiae, Homoscleromorpha Placozoa - ANSWER-No neurons, no muscles, similar to planular larva, similar to porifera, do asexual reproduction Pinacocytes - ANSWER-protective cells, make up the outer layer or poriferans, called the pinacoderm Mesohyl - ANSWER-Gelatinous layer of spongin, spicules, and archaeocytes Archaeocytes - ANSWER-Also called amoebocytes, specialized ce...

Very accurate and well written. Hand - drawn diagrams. Very organized.

BIO 181 FINAL STUDY GUIDE Lecture #1: 1. How did the four macromolecules appear on early earth? Components of “Primitive Soup”  Carbohydrates, Lipids, Nucleic Acids, Proteins (four macromolecules of life) We don’t have a clear answer but there are numerous hypotheses. 2. List and explain the basis/ background for the four main theories of how life originated on early earth. Are there any challenges these theories have to overcome? a) Oparin-Haldane Hypothesis (tested by Miller-Urey) a. ...