Experiment 1: dichotomous key practice a dichotomous key is an identification tool that starts with a broad defining characteristics and splits into two options until an organism can be identified. in this experiment, you will identify organisms by their binomial nomenclature using a dichotomous key.

An example of internal feedback working to maintain homeostasis is your a. decreased respiration rate when you are studying b. decreased heart rate when you are sad c. increased respiration rate when your muscles need more oxygen d. increased heart rate when your lungs need more oxygen

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?

Astudent poured a solution of bromothymol blue indicator into three test tubes. then he placed an aquatic plant in two of the test tubes, as shown below. he placed a stopper on each test tube and placed them all in the dark for 24 hours. bromothymol blue turns from blue to yellow in the presence of co2