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COMPARE THE ROTIFER AND BRYOZOAN • ROTIFER • BRYOZOAN How can we compare bryozoans and rotifers? ROTIFER • 1. separate sexes • 2. Ciliated crown • 3. Free swimming BRYOZOAN • • • • • 1. hermaphroditic 2. tentacles 3. sessile 4. shell 5. lives in colony INSTRUCTIONAL OBJECTIVE • 1. Identify bryozoan characteristics • 2. Identify characteristics of rotifers • 3. Compare and contrast life functions of bryozoan and rotifers ROTIFERS AND BRYOZOA • The Rotifer and the Bryozoan are microscopic marine organisms that are classified in separate phyla based on distinct characteristics. Rotifers and Bryozoans are simple, multicellular animals that carry out their life functions for survival. • GUESS THE AIM??? HOW DO ROTIFERS AND BRYOZOANS CARRY OUT THEIR LIFE FUNCTIONS? • ACTIVITY • 1. CREATE CHART ON WORKSHEET. USE RULER • 2. LOOK UP LIFE FUNCTIONS WITH BRIEF DESCRIPTION 3. LOOK UP HABITAT • 4. DESCRIBE ITS DIET(HINT WE STUDIED IT) ROTIFER STRUCTURE/BEHAVIOR FLAME CELL ANUS EYESPOT CILIATED CROWN MOUTH STOMACH GASTRIC GLAND INTESTINE CELL MEMBRANE OVARY-egg cells DIET HABITAT TESTES-sperm cells SEPARATE SEXES ROTIFER FUNCTION AND BRIEF DESCRIPTION ROTIFER STRUCTURE/BEHAVIOR ROTIFER FUNCTION AND BRIEF DESCRIPTION FLAME CELL excretion ANUS EYESPOT sensitivity CILIATED CROWN Locomotion and ingestion MOUTH ingestion STOMACH GASTRIC GLAND INTESTINE 1-way digestion(1 direction and 2 openings) CELL MEMBRANE respiration OVARY-egg cells DIET HABITAT TESTES-sperm cells SEPARATE SEXES Sexual reproduction External fertilization and development plankton BRYOZOAN STRUCTURE AND BEHAVIOR ANUS BRAIN TENTACLES MOUTH STOMACH INTESTINE CELL MEMBRANE OVARY and TESTES HERMAOPHRODITE DIET HABITAT BRYOZOAN LIFE FUNCTION AND DESCRIPTION BRYOZOAN STRUCTURE AND BEHAVIOR BRYOZOAN LIFE FUNCTION AND DESCRIPTION ANUS Excretion BRAIN Sensitivity and coordination TENTACLES ingestion MOUTH ingestion STOMACH INTESTINE 1-way digestion CELL MEMBRANE respiration OVARY and TESTES HERMAOPHRODITE Asexual-budding Sexual-external development and fertilization DIET plankton HABITAT Benthic and sessile in a shell COMPARE THE LIFESTYLE AND HABITAT OF ROTIFERS AND BRYOZOAN? ROTIFER BRYOZOA HABITAT AND LIFESTYLE ROTIFER BRYOZOAN • Live in moist sands along shore and in aquarium gravel • Swim by ciliated crown(unique to animal world) • Can telescope body • Predatory species and scavenger species • Branching colonies of bryozoans composed of hundreds of individuals cover the surface of rocks, seaweeds and shells • Some colonies stand erect and others encrust on substrates • They live in shells and let tentacles out to filter feed SUMMARY • The ROTIFER and BRYOZOAN are examples of microscopic, multicellular animals that live in marine sediments and on the surface of substrates. Rotifer has bilateral symmetry and the bryozoan has radial symmetry. SUMMARY EXIT QUIZ • 1. T or F. correct for full credit. Rotifers are asexual and Bryozoan are both sexual and asexual(budding). • 2. Describe the difference in habitats of the rotifer and bryozoan. • 3. Rotifers use which structure to help ingest food? A. ciliated crown B. tentacle C. stomach D. anus • 4. Bryozoans and rotifers have which type of digestion? A. 1-way B. 2-way Explain answer.
