Download Name: Date: Period: Today you will be moving from lab station 1

Name:
Date:
Period:
Today you will be moving from lab station 1 through lab station 7. You will have five
minutes at each of the stations, so be prepared to work diligently.
STATION 1 - SYMMETRY
If an organism is symmetrical, it will be classified as one of the following:
 BILATERAL SYMMETRY: An organism that can be divided into mirror images (divided through
one plane)
 RADIAL SYMMETRY: An organism that has a top and a bottom only, no right or left sides. It can
be divided into (roughly) identical pieces along many planes. (Example: a pizza pie)
If an organism is ASYMMETRICAL, it does not have any symmetry.
Use the computer to scroll through the presentation to identify the type of Symmetry or
Asymmetry the organism has. Write: Radial, Bilateral, or Asymmetrical on the line provided.
1) __________________
2) ____________________
3) ______________
4) ___________________
5) ____________________
6) ______________
7) ___________________
8) ____________________
9) ______________
STATION 2 – ANIMAL CELLS
You are going to create an animal cell….hmmm…what does that look
like?
Well, an animal cell contains all of the cell parts we have talked about so far, EXCEPT, it does not include
a CELL WALL, CHLOROPLASTS, or an EXTRA LARGE VACUOLE.
Match the cell parts with its function. When you finish, use the back of this packet to draw a cell model,
making sure it include all of these organelles.
Functions:
A – Contains DNA (we have 46)
B – Contains enzymes and “chews” up/recycles cell parts*
C – The environment of the cell (jelly-like)
D –Surrounds the animal cell (holds in all cell parts)
E – Controls the cell
F – Packages materials *
G – Surrounds the nucleus
H – Makes proteins
I – Transports proteins
J – stores waste, water, etc.
K – Makes ENERGY! (respiration occurs here)
____ cell membrane
____ nucleus
____ ribosomes
____ vacuole
____ nuclear membrane
____ lysosome*
____mitochondria
____ ER
____ cytoplasm
____ Golgi Bodies*
____chromosome
(*is a new organelle)
STATION 3 - REPRODUCTION
GROSS! What am I swimming in?
Most organisms in Phyla Porifera and Cnidaria are SESSILE creatures, meaning, they are stationary. There are Cnidarians
that, in the Medusa form, can move about freely. The way these organisms can mate and produce offspring is
important for the existence of their species.
Many sponges reproduce ASEXUALLY by BUDDING. This is when the parent cells can create a new organism, simply
from replicating their own cells (remember – mitosis). Other sponges can reproduce SEXUALLY by releasing sperm into
the water. These sperm are carried by water currents out of the Osculum of one sponge and into the interior cavity of
another sponge, where they are transferred to eggs. Most sponges contain both male and female sex cells, or
hermaphrodites.
Cnidarians are organisms that can reproduce both SEXUALLY and ASEXUALLY. Hydra, one type of freshwater Cnidarian,
can reproduce through BUDDING or SEXUAL REPRODUCTION. Cnidarians exhibit open-water fertilization, in that the
male organisms release sperm into the water and it is collected by the female, who then releases fertilized eggs. The
larvae (once the egg is fertilized and grows, it becomes larvae) is free-swimming (meaning it can move in the ocean).
How would the offspring of a hydra formed by asexual reproduction be different from the offspring of a hydra formed by
sexual reproduction? (Think about your DNA and how you were created)
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Cnidarians free-swimming larvae allows the sessile creature to spread their colonies out. How is this beneficial for the
species?
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Opinion: Is it more advantageous to reproduce ASEXUALLY or SEXUALLY? Explain your answer:
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STATION 4– Body Plans
Directions:
Use half of a jar of play-doh to create a sponge for the Polyp body plan, identifying the following structures: Osculum,
pores, holdfast (like the roots that hold it to the ocean floor). Use the identification tags to place them in the correct
location.
Use the play-doh to create a jellyfish in the form of a Medusa body plan. Identify the following structure: Tentacles and
Cnidocytes.
STATION 5 - TAXONOMY
Use the pictures inside the folders to classify the organisms into their
appropriate Phyla. Write the number of the picture next to the Phyla.
When you are finished, come up to the front to check your answers with the answer key.
PORIFERA – use your notes to help with identifying these organisms
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CNIDERIA – use your notes to help with identifying these organisms
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ECHINODERMATA – organisms that have spiny skin, usually have radial symmetry
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ARTHROPODA – organisms that have an exoskeleton, jointed appendages, segmented bodies; there are 4 main classes
of arthropods: insecta (insects), crustacean (lobsters, etc.), myriapoda (centipedes, millipedes), and arachnida (spiders)
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MOLLUSCA – organisms that have a soft body, there are 3 main classes: gastropoda (snails and slugs), bivalvia (clams),
cephalopoda (octopus)
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ANNELIDA – worms that are segmented (earthworms)
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STATION 6- MY NICHE
Use the microscopes to look at the slide of the Hydra. Hydra are freshwater organisms. Draw your picture below.
This hydra is a predator. It will eat small prey like Daphnia, which are
crustaceans. The hydra will catch its prey by using its cnidocytes (they
have barbed nematocysts on the end of these cells that sting the prey).
It will pull it into its internal cavity where it will use digestive enzymes to
“eat” its prey. It will then spit out the waste through its mouth (YES,
that is what I said, it only has one opening, and eats and excretes out
the same opening).
Title: _________________________
Magnification: _______________
What is the niche (carnivore, omnivore, herbivore) of a Hydra?
___________________________
Is this Hydra a POLYP or a MEDUSA body plan? __________________
STATION 7- FASTER THAN A CNIDOCYTE!
A cnidocyte fires upon being stimulated. Did you know that a cnidocyte can fire in about 700
nanoseconds! OUCH, that is fast!
Directions: You and your lab partners are going to face off! That’s right, GAME ON! Fastest person wins a REWARD!
Each person gets two chances to have the fastest reaction time.
Record your average time here: trial 1: ________________
trial 2: _________________
Here is the link: http://www.bbc.co.uk/science/humanbody/sleep/sheep/reaction_version5.swf
Draw your animal cell below (from station 2)