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 ROTIFER FUNCTION AND BRIEF DESCRIPTION

FLAME CELL ANUS

EYESPOT

CILIATED CROWN

MOUTH

STOMACH GASTRIC GLAND INTESTINE

CELL MEMBRANE

OVARY-egg cells TESTES-sperm cells SEPARATE SEXES

DIET

HABITAT

ROTIFER STRUCTURE/BEHAVIOR ROTIFER FUNCTION AND BRIEF DESCRIPTION

FLAME CELL ANUS excretion

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 TESTES-sperm cells SEPARATE SEXES Sexual reproduction External fertilization and development

DIET plankton

HABITAT

BRYOZOAN STRUCTURE AND BEHAVIOR BRYOZOAN LIFE FUNCTION AND DESCRIPTION

ANUS

BRAIN

TENTACLES

MOUTH

STOMACH INTESTINE

CELL MEMBRANE

OVARY and TESTES HERMAOPHRODITE

DIET

HABITAT

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-buddingSexual-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

• 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

BRYOZOAN

• 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.