AP Biology Lab 11
2 Part Lab
Part A: Response to Environmental Variables
Activity A1: Initial Observation of Isopod Behavior
Activity A2: Orientation Behavior of Isopods
Activity A3: Designing an Experiment to Test
Part B: Courtship Behavior in Fruit Fruit
National Science Education
Unifying Concepts and Processes
Systems,order, and organization
Evidence, models, and explanation
Constancy, change, and measurement
Science as Inquiry
to do scientific inquiry
Understandings about scientific inquiry
Behavior of organisms
Observe animal behaviors relating to
Observe courtship behavior
Design and conduct animal behavior
Sowbugs (Porcellio laevis) and pill bugs
Roly-polies, potato bugs, wood lice
Breathe with gills, must remain moist
Similar size, color, and life cycle
Different Response to threats
Pill bugs- curl up in tight ball for protection
Sow bugs- either flee or remain perfectly still, appearing
to be dead
Procedure- Activity 1A
Observe the isopods for 10 minutes.
Observe in their undisturbed behavior
Note their behavior.
Did you note any agonistic behavior (social
interaction)? If so, explain the behavior.
Are the movements of the isopods better
described as taxis or kinesis movements?
Taxis- an innate behavioral response by an organism to a directional
stimulus or gradient of stimulus intensity
EX. Chemotaxis, phototaxis, geotaxis, thermotaxis
Kinesis- like taxis, a movement or activity of an organism to a stimulus.
Different from taxis in that the response to the stimulus provided is non-
Procedure- Activity 2A
Place clean filter paper into each side of the choice
Using the dropping pipet, saturate the filter paper
on one side of the chamber. Pour off any excess
water; do not let the water run into the other side
of the chamber or moisten the paper there.
Using the sorting brush to transfer 5 isopods to
each side of the chamber. Put on the lids.
Count and record in Table 1 the number of
animals on each side of the chamber, every 30
seconds for 10 minutes. Continue to record even if
the isopods all move to one side or stop moving.
Procedure: Activity 3A
Design an experiment to test isopod behavior
Choice Chamber Side 1 Chamber Side 2
Cool vs. Warm Resealable plastic bag filled with Resealable plastic bag filled with
ice warm water
Light vs. Dark Exposed to light Wrapped with aluminum foil
Light vs. Shade Exposed to light Covered with several screens
Low pH vs. High pH A few drops of NaOH on filter A few drops of HCl on filter paper
Substrate material vs. Absence of Substrate material present Substrate material absent