animal symmetry

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1. Open to next open Example and Note page - skip them and go to the next open example and note page
2. Write the following Title (on the note page):
Symmetry and the Animal Kingdom
3. Draw Cornell lines on the Note pages
4. Update your Table of Contents
5. Open Textbook to page 314-315
6. Fold both Plant Webquest Handouts into a hamburger bunthen Staple one on an Example Page and one on a Note
Page
7. Update Table of Contents
Cornell Instructions Blue (left of line)
White/Red – Don’t write
Yellow (right of line)

Essential Question: What is symmetry and
what types are found in the animal
kingdom?

Objective: After viewing a PPT about
symmetry, students will be able to describe
the type of symmetry found in several
specimens by completing a chart with at
least 80% accuracy.
 Definition
of the two types of
symmetry (radial and bilateral)
 Definition of no symmetry
 The Animal Kingdom
› Each of the distinct phyla
•
Symmetry (in biology is) - “the balanced
distribution of duplicate body parts or shapes”.
•
The body plans of most organisms show some
form of symmetry, either radial symmetry or
bilaterial symmetry.
•
Only a small minority exhibit no symmetry (are
asymmetric)
•
Symmetry: balanced arrangement of body parts

having many equallyspaced lines that pass
through a central point

Many planes of
symmetry

body plan with
two halves that
are mirror
images

Only one plane
of symmetry
body plan with no planes of symmetry
 Ex. simplest animals (sponges) are
asymmetrical.


What symmetry do these animals have?

The animal kingdom is one of the six kingdoms we will
learn about


6 Kingdoms (most complex to simplest):
Animal, Plant, Fungi, Protist, Eubacteria,
Archebacteria

Because there are so many different kinds of animals,
the kingdom is broken down into distinct phyla to
help categorize
Remember the 7 Levels of Classification - we
learned in class
 Kingdom  Phylum  Class  Order  Family 
Genus  Species

 Porifera
 Cnidaria
 Annelida
 Nematoda
 Platyhelminthes
 Mollusca
 Echinodermata
 Arthropoda
Chordata
Sponges
 Have many pores, sessile (nonmoving/attached), filter-feeders
 Only phylum with NO symmetry


Drawing the Animal Tree
› Leave room to label the trunk and branches
› But only draw and label what’s required
› You’ll leave enough room to draw an organism
at the end of each branch
› Just draw the base of the trunk and first 2
branches
› Draw and label a Sponge and Cnidarian





Jellyfish, sea anemones, hydras, coral
Jelly-like animals that have a bell or
umbrella shape
Possess stinging cells
Radial symmetry
Medusa vs Polyp (pg 324)

Sponge , Cnidarian & CoralBrainpops:
http://www.brainpop.com/science/seea
ll/
Flatworms
 Soft, thin, flat bodies
 One opening for digestion
 Body symmetry: bilateral

Draw and label a Flatworm on your Animal Tree
Roundworms
 Worms that are parasites
 Two openings for digestion
 Body symmetry: bilateral

On your Animal TreeDraw and label a Roundworm on a new branch above Cnidarians
 Segmented
worms
 Long animals divided into segments
 Two openings for digestion
 Bilateral symmetry
On your Animal TreeDraw and label a Segmented Worm on the branch that says
Roundworms in your textbook pg 314
1.
(Mod 2/5) Put Bird Beak Lab Homework in Mod #
Inbox
2.
Put a Cornell Line on the next Note page
3. Open Textbook to page 314
Cornell Instructions Blue (left of line)
line) White/Red – Don’t write
Yellow (right of




Sea stars, brittle stars, sea urchins,
sand dollars, sea cucumber
Many can regenerate
These marine animals have plates with spines
Exhibit radial symmetry
Draw a Starfish on the branch above Roundworms – Label it “Echinoderms”

http://www.youtube.com/watch?v=lAK
G8aCg2y4&feature=related

Identify the different organisms
Bivalves (Clams & Mussels) – Filter Feeders
 Cephalopods (Squid & Octopuses)
 Gastropods (Snails & Slugs)
 Body symmetry: bilateral and radial
 Soft-bodied animals, usually have a shell

Draw and label any Mollusk on the next branch

http://www.brainpop.com/science/diver
sityoflife/mollusks/








Crustaceans (crabs, lobster)
Insects (Butterflies, Grasshoppers)
Arachnids (Spiders)
Millipedes and Centipedes
Segmented body parts
Jointed appendages (legs)
Tough exoskeleton made of chitin
Bilateral symmetry
Draw and label organisms that represent the 4 types of Arthropods
http://www.brainpop.com/science/diver
sityoflife/arachnids/
 http://www.brainpop.com/science/diver
sityoflife/amphibians/

Vertebrate (have a backbone) animals
 Fish, Amphibians, Reptiles, Birds, and
Mammals
 Body symmetry: bilateral

Draw and label organisms that represent the 5 types of Chordates

In your science notebook, you are going to
be drawing detailed sketches of various
specimens at your lab station.

You must include the following:
Label the organism
2. Sketch the organism
3. Draw the plane(s) of symmetry and identify
what kind of symmetry the animal has
(radial, bilateral, or asymmetrical)
1.
Name of
Organism
1. Crayfish
2.
Phylum
Symmetry
Arthropoda
Bilateral
1
2
3
4
5
6
7
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