Describe the impact of a large migration of dolphins into the area. How would this directly affect other organisms in the ecosystem

How many variables are altered in a good experiment? a.1 b.0 c.2 d.3

Casts and mold are a type of preservation where the original material decays, leaving a mold in surrounding rock that can be filled with another sediment a. true b. false

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