4. While on the Galapagos Islands, Darwin observed variety in one type of animal that was later used to help him form his theory of natural selection.
Which type of animal was this? *
Finches

Giant turtles

Lemurs

Bananas

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