Natural ecosystems are more stable than artificial ecosystems as they have less biodiversity.

Construct at least two possible hypotheses for the student’s experiment.

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

The most famous fossil called archaeopteryx is which of the following? a dinosaur a fern a fish a bird