Graphing Quiz 1
Honors Biology
Spring 2023
Name____________________________________Number___________Block______________Date______________________
Daphnia are small water fleas that are relatively transparent and
thus their heart beat can be monitored under a microscope.
In a series of experiments, 3 different Daphnia fleas were
exposed to either water with no drugs (control) or dilute
solutions of different drugs (shown in the table below). After a
brief period of equilibration after exposure to the drug, the
heartbeat of the flea was counted for 1 minute and recorded in
the table below:
Answer the following questions and then construct a line graph.
Flea used in
experiment
Number of heart beats/ minute
No drug
Adrenaline
Caffeine
Flea 1
50
80
38
Flea 2
28
74
24
Flea 3
55
64
50
What is the dependent variable? _____________________________________________________
What is the independent variable? __________________________________________________