1. COMPARE THE ROTIFER AND BRYOZOAN

2. How can we compare bryozoans and rotifers?
1. separate sexes
2. Ciliated crown
3. Free swimming
1. hermaphroditic
2. tentacles
3. sessile
4. shell
5. lives in colony

3. INSTRUCTIONAL OBJECTIVE
1. Identify bryozoan characteristics
2. Identify characteristics of rotifers
3. Compare and contrast life functions of bryozoan and rotifers

4. 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???

5. 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)

6. 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

7. 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

8. BRYOZOAN STRUCTURE AND BEHAVIOR
BRYOZOAN LIFE FUNCTION AND DESCRIPTION
ANUS
BRAIN
TENTACLES
MOUTH
STOMACH INTESTINE
CELL MEMBRANE
OVARY and TESTES HERMAOPHRODITE
DIET
HABITAT

9. BRYOZOAN STRUCTURE AND BEHAVIOR
BRYOZOAN LIFE FUNCTION AND DESCRIPTION
ANUS
Excretion
BRAIN
Sensitivity and coordination
TENTACLES
ingestion
MOUTH
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

10. COMPARE THE LIFESTYLE AND HABITAT OF ROTIFERS AND BRYOZOAN?

11. 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

12. 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.

13. 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.